OPINION
Sharron Bynum (“Bynum”) appeals from the judgment entered by the district court following her conviction for aiding and abetting former City and County of Honolulu Councilman Andrew K. Mirikita-ni (“Mirikitani”) in intentionally and knowingly obtaining by fraud, and converting property of the City and County of Honolulu (“Honolulu”), in violation of 18 U.S.C. § 666, and of affecting interstate commerce by aiding and abеtting Mirikitani in committing extortion, under color of official right in violation of 18 U.S.C. §§ 1951, 2. Bynum challenges the facial constitutionality of § 666 and the determination by the district court, instead of the jury, regarding whether there was a federal nexus to the violation of § 666. Bynum also appeals from the two-level upward adjustment of her sentence imposed pursuant to U.S.S.G. § 2Cl.l(b)(l) and the eight-level upward adjustment of her sentence imposed pursuant to U.S.S.G. § 2Cl.l(b)(2)(B).
We conclude that § 666 is facially constitutional and that the district court did not err in determining that the finding of a federal nexus for the valid application of § 666 is a question of law for the court. We also hold that the district court did not err in imposing a two-level sentence enhancement pursuant to U.S.S.G. § 2Cl.l(b)(l) and an eight-level sentence enhancement as required by U.S.S.G. § 2Cl.l(b)(2)(B). 1
I
Mirikitani was a member of the Honolulu City Council in 1999. At that time, Bynum was Mirikitani’s live-in romantic companion. She ran his council office. In *989 1999, Honolulu’s gross annual budget was approximately one billion dollars. Roughly one hundred forty million dollars of its budget came from the federal government in the form of grants and programs for capital and operating expenses. Honolulu received approximately $898,224 of unsegregated federal funds in 1999.
In June of 1999, MiriMtani offered to authorize an $11,000 bonus to a part-time staff member, John Serikawa (“Serika-wa”), if Serikawa would agree to pay Mi-riMtani one-half of the after-tax gain resulting from the bonus. MiriMtani also promised to make Serikawa a full-time employee and increase his annual salary from $23,000 to $28,000. Serikawa accepted the proposal and received a bonus of $9,617 paid out of Honolulu’s general fund.
When a dispute arose between MiriMta-ni and Serikawa as to the proper sum for the agreed-upon Mckback, MiriMtani referred him to Bynum to determine the correct amount. At Bynum’s request, Mi-riMtani demanded that Serikawa submit his bonus pay stub to her for inspection. When the pay stub was returned to Seri-kawa, it contained Bynum’s handwritten notes аnd calculations.
A few weeks later, when Serikawa was taking care of Bynum and MiriMtani’s residence during their absence, he left one of the Mckback payments on a counter in their apartment. Serikawa also paid part of the expenses for a trip taken by MiriM-tani and Bynum to celebrate her birthday. Bynum was aware of Serikawa’s contribution to the cost of the trip. She told Serikawa that the balance of $114 dollars owed to MiriMtani was forgiven.
In May or June of 1999, MiriMtani made a similar Mckback proposal to Cynthia McMillan (“McMillan”), another of his Honolulu employees. MiriMtani instructed McMillan that the Mckback was to be paid by check to Mirikitani’s campaign fund. McMillan received a bonus of approximately $16,916 on July 16, 1999. On the same date, McMillan transmitted checks to MiriMtani’s campaign fund in the amount of $4,000 from her own bank account and $250 from her husband’s bank account. At trial, McMillan testified that she understood that a refusal to engage in MiriMtani’s Mckback scheme might lеad to “a bad working relationship or something.”
Bynum discussed McMillan’s participation in the kickback scheme with her on two occasions during the summer of 1999. In one conversation, Bynum told McMillan that the “Mckback couldn’t have come at a better time” for Bynum and MiriMtani “because they had a lot of bills.” In another conversatiоn, Bynum told McMillan that the kickback scheme permitted By-num to be paid for the work she performed in Mirikitani’s council office. At trial, the Government presented evidence that By-num covered up McMillan’s Mckback in a campaign spending report.
II
Bynum contends that § 666 is facially unconstitutional “because it does not requirе a connection between the alleged criminal conduct ... and the federal funds distributed to the states by Congress.”
2
*990
Bynum did not attack the facial constitutionality of § 666 in the district court. The Supreme Court has left the question whether to review an issue first introduced on appeal “to the discretion of the courts of appeals.”
Singleton v. Wulff,
The Supreme Court has ruled that “[a] facial challеnge to a legislative Act is ... the most difficult challenge to mount successfully, since the challenger must establish that no set of circumstances exists under which the Act would be valid.”
United States v. Salerno,
To be successful in her facial challenge to the constitutionality of § 666, Bynum must demonstrate that there is no set of circumstances in which the statute could be applied in a constitutionally valid manner.
Salerno,
The Courts of Appeals for the Eighth and the Eleventh Circuits have both expressly held that § 666 is facially constitutional.
United States v. Sabri,
[A] basis for the enactment of § 666 may be found in Congress’s authority, under the Necessary and Proper Clause, to protect its capacity to fruitfully exercise the spending power. As a means of ensuring the efficacy of federal appropriations to comprehensive federal assistance programs, the anti-corruption enforcement mechanism strikes us as bearing a sufficient relationship to Congress’s spending power to dispel any doubt as to its constitutionality.
Id.
at 1325 (citing Art. I § 8, cl. 18);
accord Sabri,
Ill
Alternatively, Bynum argues that a federal nexus is required for a valid application of § 666. We review questions of law de novo.
Harper v. United States Seafoods LP,
In
United States v. Cabrera,
In
Cabrera,
we set forth the requirements for a prosecution pursuant to § 666. We specified that “following the language of the statute, we [hаve] ruled that only two elements are required to sustain a conviction under § 666:(i) the defendant must be an agent of a government agency receiving $10,000 or more in federal funding annually, and (ii) the [proscribed] transaction ... must exceed $5,000.”
Id.
at 509 (citing
United States v. Simas,
Bynum was convicted of aiding and abetting Mirikitani in stealing more than $5,000 from Honolulu’s general fund, which
*992
contained more than $898,224 in unsegregated federal funds. At trial Bynum stipulated that Mirikitani was one of nine council members whose votes controlled the disbursement of civic funds derived from federal funding. Accordingly, we conclude that evidence was sufficient to demonstrate a federal nexus, if one is required. As was the case in
Cabrera,
“[t]o require a greater showing of federal interest on these facts would amount to a requirement of direct tracing, which both the Supreme Court and the Ninth Circuit have rejected.”
Cabrera,
IV
Bynum argues that under
Apprendi v. New Jersey,
In
Apprendi,
the Supreme Court held that “ ‘[t]he Due Process Clause protects the accused against conviction except upon proof beyond a reasonable doubt of every fact necessary to constitute the crime with which he is charged.’ ”
Apprendi,
*993
In
United States v. Klimavicius-Viloria,
V
Bynum also contends that the district court erred in determining that sufficient facts existed to subject her to a two-level upward adjustment of her sentence under U.S.S.G. § 201.1(b)(1) for participating in the unlawful payment of two or more individuals, when the jury conviction did not specify whether Bynum was guilty of payment to one or two parties. Bynum concedes her involvement in the kickback scheme with regard to Serikawa. She maintains, howevеr, that the record does not demonstrate that she was involved in the unlawful payments to McMillan. We review a district court’s factual findings in the sentencing phase of a trial for clear error.
United States v. Williams,
The Sentencing Guidelines require an enhancement whenever “the offense involved more than one bribe or extortion.” U.S.S.G. § 201.1(b)(1). The Guidelines also authorize a two-level upward adjustment for “all reasonably foreseeable acts or omissions of others in furtherance of [a] jointly undertaken criminal activity,” even if conspiracy is not a charged offense. U.S.S.G. § lB1.3(a)(l)(B). The Government presented evidence that Bynum and Mirikitani were jointly involved in a kickback scheme and that Bynum had knowledge of the payments Mirikitani made to McMillan. The district court therefore did not err in concluding that it was foreseeable to Bynum that Mirikitani would solicit a bribe from McMillan in furtherance of the jointly undertaken scheme to embezzle public funds.
VI
Bynum asserts that the district court erred in finding that the bonus kickback sсheme was designed for the “purpose of influencing” a government official. The district court’s interpretation of the Sentencing Guidelines is reviewed de novo.
United States v. Alexander,
CONCLUSION
We conclude that § 666 is facially constitutional. We also hold that the district court did not err in concluding that the existence of a federal nexus — if one is required under § 666 — is a question of law for the court, rather than an element of the offense that must be submitted to the jury. We also determine thаt the district court did not err in its sentencing decisions.
AFFIRMED.
Notes
. The district court had jurisdiction pursuant to 28 U.S.C. § 1331. We have jurisdiction pursuant to 28 U.S.C. § 1291 and 18 U.S.C. § 3742.
. 18 U.S.C. § 666 provides in pertinent part:
(a) Whoever, if the circumstances described in subsection (b) of this section exists—
(1) being an agent of an organization, or of a State, local, or Indian tribal government, or any agency thereof—
(A) embezzlеs, steals, obtains by fraud, or otherwise without authority knowingly converts to the use of any person other than the rightful owner or intentionally misapplies, property that—
(i) is valued at $5,000 or more, and *990 (ii) is owned by, or is under the care, custody, or control of such an organization, government, or agency ...
(2) corruptly gives, offers, or agrees to give anything of value to any person, with intent to influence or reward an agent of an organization or of a State, local or Indian tribal government, or any agency thereof, in connection with any business, transaction, or series of transactions of such organization, government, or agency involving anything of value of $5,000 or more;
(b) The circumstances referred to in subsection (a) of this section is that the organization, government, or agency receives, in any one year period, benefits in excess of $10,000 under a Federal program involving a grant, contract, subsidy, loan, guarantee, insurance, or other form of Federal assistance ....
. The Hobbs Act, 18 U.S.C. § 1951 (1994), rеads in pertinent part:
(a) Whoever in any way or degree obstructs, delays or affects commerce or the movement of any article or commodity in commerce, by robbery or extortion ... shall be fined under this title or imprisoned ... or both
(b) As used in this section'—
(3) The term "commerce” means commerce within the District of Columbia, or any Territory or Possession of the United States; all commerce between any point in a State, Territory, Possession, or the District of Columbia and any point outside thereof; all commerce between points within the same State through any place outside such State; and all other commerce over which the United • States has jurisdiction.
. Count two of the indictment reads in pertinent part:
(a) The City and County of Honolulu was a local government that received federal assistance in excess of $10,000 during the one-year period beginning July 1, 1998.
(b) Mirikitani was an agent of the City and County of Honolulu as a member of the ... Honolulu City Council.
(2) From on or about July 15, 1999, up until a date in September, 1999, in the district of Hawaii, defendant Mirikitani, and defendant Sharron Bynum as an aider and abettor, did intentionally ... convert ... property of the City and County of Honolulu of a value of $5,000 or more ... for his own benefit.
