The most optimistic say Obama and Democrats in Congress will face a political backlash unless the economy improves by Election Day 2010.

“We’ve got to see an uptick by August or the Democratic majority is in jeopardy,” said Rep. Bart Stupak (D-Mich.), whose state had an 11.6 percent unemployment rate in January.

Stupak doesn’t fault Obama for pursuing healthcare reform, because high medical costs are intertwined with the economic difficulties, he said.

But Obama must move quickly, he added, saying, “By summer there is no more honeymoon. Period.”…

Pervasive voter uncertainty means Obama needs to emphasize short-term measures to fix the economy, Bryan said. “If there’s not a sense that we’ve reached bottom and there’s a sense of uncertainty, I think the president’s support will erode fairly rapidly,” he added.