The Senate will hold its first major vote on the CLARITY Act on September 15, a procedural test that prediction markets give less than a one-in-five chance of passing. Cloture on the motion to proceed to H.R. 3633 is scheduled for 2:15 p.m. ET and requires 60 votes. Polymarket prices the bill-specific contract at 19% to 20%. Kalshi’s broader market-structure contract sits at 18% to 19%. Both have fallen sharply since February, when enactment odds for 2026 traded above 80%.
The arithmetic is unforgiving. With at least two Republican senators signaling opposition, supporters need at least nine Democratic votes. The sticking point is an ethics provision that would restrict lawmakers from holding digital assets. A Republican amendment released this week makes changes to decentralized finance rules and expands credit unions’ authority to handle digital assets, but leaves the ethics language untouched. That sets up the same fight that sank earlier attempts.
Who is blocking what
Republican Senators Jerry Moran and Josh Hawley have indicated they could vote against the bill if the current ethics language stays. Banking groups are pushing from the other side of the same issue: the American Bankers Association and the Independent Community Bankers of America want changes to provisions that would let crypto platforms pay yield-like rewards, arguing such payments could drain deposits from community banks and curb their lending.
Treasury Secretary Scott Bessent wants the Senate to advance the bill first and negotiate the disputed sections afterward. He has warned that failing to move the legislation would send a negative signal about American competitiveness in digital-asset regulation and about the country’s ability to combat crypto-related crime. The White House backed the September 15 date publicly, an unusual step for a procedural vote and a sign leadership views the window as closing.
Industry money has followed. A crypto PAC spent $1.5 million on ads targeting swing-state senators, with Michigan and Iowa as the focus. Both states have competitive Senate races where a crypto-friendly position can differentiate a candidate without alienating the base. The spending lifted one prediction-market contract measuring the chance of 60 or more votes from 21% to 44% in three days in late August, though the broader enactment odds have since slid back down.
What a vote actually decides
Cloture is not final passage. Sixty votes would open debate, after which the bill faces amendments and a later floor vote. But the Senate calendar leaves almost no room for a second attempt if Tuesday fails. Legislative days before the midterm recess are scarce, and House scheduling makes late-year passage increasingly unlikely even if the Senate moves. In practice, the procedural vote functions as the bill’s main test.
Galaxy Research cut its passage estimate to 30% earlier this summer, citing unresolved disputes over DeFi provisions, stablecoin yield rules and the ethics restrictions. Grayscale Research takes a different view of the stakes. In a note published this week, the asset manager argued that federal crypto policy advances on multiple fronts regardless of the vote, pointing to ongoing work on stablecoins, token issuance, tokenized securities and derivatives. Its position: CLARITY would be the most comprehensive federal framework, but its failure would not halt the rest.
| Signal | Reading |
|---|---|
| Polymarket H.R. 3633 contract | 19-20% passage odds |
| Kalshi market-structure contract | 18-19% |
| Enactment odds in February | Above 80% |
| Galaxy Research estimate | 30% |
| Republican defectors | At least 2, Moran and Hawley leaning no |
The market’s quiet shrug
Bitcoin traded near $77,700 on Friday, and the CLARITY countdown has barely registered in price action. That is a change from earlier in the year, when legislative headlines moved crypto markets visibly. Traders have watched the odds collapse from 82% to 14% over seven months and appear to have priced in failure. The CFTC chair said this week the agency has adequate authority under existing law, and an SEC crypto framework reportedly includes provisions aligned with the bill, which softens the downside of a lost vote.
The counterargument comes from bill supporters who say a failed cloture vote would do real damage to the United States’ position as digital-asset firms choose jurisdictions. Several exchanges have already shifted listing and licensing work toward Europe, where MiCA implementation gives them a single rulebook across 27 countries. Senate aides have floated the possibility of a revised ethics compromise before Tuesday, but no text has circulated. As of this writing, the whip count has not moved enough for either side to claim confidence.
The DeFi amendment in the Republican draft is itself a flashpoint. It would narrow the definition of a decentralized protocol that falls outside licensing requirements, a change consumer groups call too permissive and DeFi advocates call still too broad. Credit unions, meanwhile, welcome the expanded custody authority, which would let them hold digital assets for members without partnering with a crypto custodian. Each fix for one constituency creates a problem for another, which is why the amendment process has produced text but not agreement.
If cloture passes, the bill enters debate with amendments expected on DeFi definitions, banking yield provisions and the ethics section. If it fails, attention shifts to regulatory agencies and to whether leadership retries the vote in a post-midterm lame-duck session, a scenario most aides consider remote. Either way, Tuesday’s count will be the first hard number on where the Senate actually stands, replacing months of estimates with a recorded vote.