These workers only have their own union to blame. Had the UAW made some reasonable concessions, this thing would have passed. There is no reason to give them money, if they aren't willing to put themselves in a position to at least be somewhat competitive and able to make a viable run at staying in business.
As for the future of the Republicans, it will depend on what happens.
If the doomsday scenario plays out and big 3 and ALL of the support companies go out of business, then they may take some blame for the economy, should the US face a severe depression.
If on the other hand, these companies restructure and keep ticking, then they will have the upper hand. Keep in mind that the American people are 2-1 against the bailout.