Neither House Majority Leader Steny Hoyer of Maryland or House Republican Whip Roy Blunt of Missouri would predict when the Senate bill, if passed, would be before the House, but said on NBC's "Today" show they were more optimistic about its chances of passage.

The House Monday voted down the bailout plan for the U.S. financial markets but three things have changed since the vote, Blunt and Hoyer said.

The American public "saw their 401(k) plan, for instance, very substantially reduced in value on Monday," Hoyer said, moving the crisis away from Wall Street and onto Main Street.

Also, the Senate added amendments that would provide tax breaks for businesses not offset elsewhere -- something Hoyer says is troubling to House Democrats -- and would raise the federal deposit insurance from $100,000 to $250,000, Blunt said.

The Republican whip noted constituent calls have shifted from "Don't do this" to "You have to do something; this may be the best thing out there."

"We're going to work on this until we address it," Hoyer said. "We need to act, and we need to act in a very substantive way to stabilize our markets. "