No, it's not. People have not hurt enough, personally, yet. Times haven't gotten bad enough. For me, the best model is Britain in the 1970s. The Brits had a legacy of government support, the dole, featherbedded unions, subsidized everything, and their economy was absolutely crumbling. It took a horrible set of strikes in 1978-79, where garbage piled up and even the morticians went on strike, to get them to reverse course. We were in the same boat, really, with Nixon/Ford/Carter, all of whom had basically the same economic and environmental policies.
However, no matter how bad things get, Republicans will NOT be the solution until they stop parroting the Dems and adopt an entirely new language that does NOT accept "global warming," limits to America's oil production and consumption, and endless government handouts. The language needs to be blunt, and we need to NAME NAMES when saying "UDALL has caused your gas to be $4 a gallon. How's that working out for you?"
The problem is that Republicans have a mixed message. John McCain is the rat-lite part of the party. His message is not much different than the rats on energy and immigration. He would be an improvment but perhaps not a great improvement in those areas. It will be up to individual candidates and the conservative wing of the party to fire back against the rats.
The rats are reasonably united. They have blocked a good deal of Bush's initiatives on energy, litigation reform, and entitlement reform. They will probably come apart after taking complete control.