New Hampshire Republican Sen. Judd Gregg, a key participant in Saturday's late-night bailout negotiations, said Sunday afternoon that both presidential candidates played a part in the deal that was reached and that final congressional votes are likely Monday.

Gregg, the ranking Republican on the Senate Budget Committee, also said negotiators Saturday night were told in no uncertain terms from leading economists that a meltdown on Wall Street was imminent if the Bush administration's $700 billion plan was not approved as soon as possible.

"Getting this done soon, promptly, is absolutely critical to the confidence of the markets," Gregg said. "I can't understate that issue."

Both Democratic presidential nominee Barack ObamaBarack Hussein ObamaOvernight Energy: Dems ask Pruitt to justify first-class travel | Obama EPA chief says reg rollback won't stand | Ex-adviser expects Trump to eventually rejoin Paris accord Overnight Regulation: Trump to take steps to ban bump stocks | Trump eases rules on insurance sold outside of ObamaCare | FCC to officially rescind net neutrality Thursday | Obama EPA chief: Reg rollback won't stand Ex-US ambassador: Mueller is the one who is tough on Russia MORE and GOP nominee John McCainJohn Sidney McCainLawmakers worry about rise of fake video technology Democrats put Dreamers and their party in danger by playing hardball Trump set a good defense budget, but here is how to make it better MORE were in close contact with the lead negotiators throughout the nine-hour session Saturday afternoon and evening, Gregg said, and he confirmed media reports that economists' perspectives were sought as well.

On other key points, Gregg said: