Interviews with more than two dozen operatives and House members in both parties reveal that the cautious optimism of the spring has given way to a more grim view of the hurdles facing Democrats in 2012 — an unpopular president on the ballot; scores of vulnerable Republican incumbents bolstered by redistricting; free-spending, GOP-allied independent groups that will outpace their newer Democratic counterparts; and long-standing historical election trends…

“I’m glad the election’s not today,” said Democratic pollster Keith Frederick, a veteran of House races. “Every poll shows independents losing their patience for the president. These House elections tend to get nationalized, and there’s no doubt right now that as a referendum on Barack Obama, House Democrats lose.”…

“It didn’t have to be this way,” said another House Democrat who requested anonymity in order to speak candidly. “Obama’s presidency has fizzled. It’s going to be every person for himself in 2012. There just won’t be any coattails, and any effect he does have on the ballot will hurt us.”

“It’s hard because we’re inherently linked to the president and his number,” said a top Democratic operative close to party leadership. “It’s got us all pessimistic.”