President George Bush, Vice President Dick Cheney and others have been working the phones, calling about three dozen House members to lobby for passage of the bill that the House is expected to take up Friday, White House spokesman Tony Fratto said.

The Senate passed a modified plan to stabilize the U.S. markets 74-25 Wednesday.

"(All) of the members saw the market reaction on Monday also after the vote, and I think that clarified things for a lot of members," Fratto said. "(Some) weren't sure whether we were really in a crisis situation."

Bush heard from some members "who had been no votes on Monday will be yes votes," Fratto said. "They may have changed their own minds, or he changed their minds."

Fratto said the White House was "optimistic" about the modified bill's chances for passage in the House.