Democracy Corps, a project of James Carville and Stan Greenberg, notes that House Republican incumbents helped themselves — at least in terms of keeping their jobs — with the bailout vote:
Most of these incumbents initially voted against the Wall Street bailout, which was less popular in these incumbent districts than in the open seat races.[3] So it is possible that these incumbents have marginally improved their standing by opposing the bailout.This possibility is supported by the fact that in the incumbent districts Democrats are only even on who would do a better job with the economy and trail by 2 points on who would best handle the financial crisis (whereas they lead by 5 and 4 points on those issues respectively in the open seats).
So if the Republcians in targetted seats who are most likely to win re-election voted against the bailout, it seems likely that one of the "lessons of the 2008 election" could be that the GOP shouldn’t abandon its core principles on the bailout. This could have a real impact on the future of the caucus.