The country’s largest cloud and chip companies have flooded Washington this weekend with a final-stretch lobbying campaign aimed at killing the Sanders-Ocasio-Cortez AI training moratorium before it reaches a House Ways and Means Committee vote on Wednesday, according to disclosure filings and congressional staff familiar with the meetings.

In the seven days since the Senate narrowly passed the bill on a 52-48 vote, hyperscaler chief executives, general counsels and a rotating cast of policy heads have logged more than 90 documented meetings with House members and senior staff, a tally compiled from Wednesday-through-Friday visitor logs by the watchdog group Open Influence. Three CEOs — from companies that together operate the majority of U.S. commercial training compute — were in Washington on Friday alone, according to two House aides who confirmed the schedule on condition of anonymity to discuss private meetings.

“It is the most concentrated industry presence we have seen on a single piece of legislation since 2018,” said Maya Reinhardt, a senior fellow at the Aspen Tech Policy Hub and a former Commerce Department official. “They are treating the Ways and Means vote as the only line of defense, because if it clears committee, the math on the floor gets uncomfortable for them very fast.”

The bill, formally the Algorithmic Energy and Labor Protection Act, would impose an 18-month moratorium on training runs above a defined compute threshold and direct the Treasury to study a per-FLOP excise tax on frontier model training. It cleared the Senate on April 7 with three Republicans and two Independents joining most Democrats; five Democrats voted no, citing jobs and competitiveness concerns. The House Ways and Means Committee, which has jurisdiction over the bill’s tax provisions, is scheduled to mark it up on Wednesday.

A spokesperson for Sen. Bernie Sanders, I-Vt., who co-sponsored the bill with Rep. Alexandria Ocasio-Cortez, D-N.Y., said the senator’s office has tracked “an unprecedented escalation of corporate pressure” in the past 10 days but believes committee Democrats are holding. “Senators in both parties looked at the grid data and the wage data and concluded the country needs a pause,” the spokesperson, Liam Carrera, said. “We expect the House will reach the same conclusion.”

Industry groups dispute that framing. The Computing Infrastructure Council, the trade association that represents the four largest U.S. cloud operators, has spent at least $14 million on advertising in the past two weeks, according to AdImpact estimates, and on Friday released a letter signed by 91 university computer-science department chairs warning that an 18-month moratorium would “freeze U.S. research at a moment of intense international competition.”

“The bill, as drafted, doesn’t distinguish between a frontier training run and a graduate student’s protein-folding model,” said Dr. Howard Lin, the council’s chief economist, in an interview Saturday. “We support targeted regulation. We do not support a blunt instrument that hands the leading edge of this technology to other countries.”

Committee staff said the most intense lobbying has focused on a small group of moderate Democrats whose districts host either large data-center clusters or significant semiconductor manufacturing, including members from Texas, Arizona, Oregon and northern Virginia. Two of those members, who voted to advance similar tech-friendly amendments earlier this year, have not publicly stated a position on the moratorium.

The committee’s Republican members are widely expected to vote no in a bloc, leaving the outcome dependent on whether Democratic chairwoman Rep. Suzan DelBene, D-Wash., can hold her caucus together. A spokesperson for DelBene declined to characterize the vote count but said the chairwoman believes the bill, “as currently written, requires significant amendment to address grid, research and labor concerns simultaneously.”

President Donald Trump has not formally taken a position, but the White House has signaled skepticism. Press Secretary Karoline Leavitt told reporters Thursday that the administration “is reviewing the bill” and considers AI competitiveness “a core national security interest.” Two administration officials, speaking on condition of anonymity, said the president is unlikely to veto the legislation if it reaches his desk but would prefer it be modified or defeated in committee.

The lobbying surge comes against the backdrop of an industry that has spent much of the past 18 months scaling power-purchase agreements with utilities and signing long-dated nuclear and gas-fired electricity contracts to support new training campuses in West Texas, central Ohio and the Pacific Northwest. Several of those contracts include force-majeure clauses tied to federal regulation, according to two energy attorneys who have reviewed the agreements; one said a moratorium could trigger renegotiation of as much as 4 gigawatts of contracted load.

“This is not just a software fight,” said John Reilly, a senior research analyst at Citi covering data-center infrastructure. “The capital that has been committed to the build-out over the past two years assumes a regulatory environment without a hard pause. A moratorium reprices the assumptions on roughly $90 billion of announced spend.”

Equity markets have so far treated the bill as unlikely to become law. Shares of the largest cloud and chip companies are slightly higher over the past five trading sessions, even after the Senate passage, and the Nasdaq Composite has recovered most of the losses tied to the Iran war earlier in the spring. Several analysts said pricing implies a probability below 30 percent that the moratorium reaches the president’s desk in its current form.

Reform-oriented critics of the bill, including a small group of academic AI safety researchers, have urged Congress to pursue narrower legislation focused on disclosure, evaluation requirements and grid-impact assessments rather than a blanket moratorium. Sanders’ office said the senator remains open to amendments but will oppose any version that drops the compute threshold.

Committee aides said a final witness list for Wednesday’s markup is expected by Monday afternoon, and that additional procedural steps would be announced after caucus meetings early in the week.