Wrong. Coulter savagely, unfairly and disingenuously savaged EVERY Republican who ever ran against Romney in the 2008 and 2012 primaries. She did everything she could to nominate her pet northeastern moderate Republican. She also went after McCain in 2008 far worse than Ingraham's ever gone after anyone during an election. Coulter is the most dangerous conservative pundit in America. She makes everyone think she's a real conservative and then she destroys real conservatives when it counts.
But this election was in part lost by voters who blame the economy on G. W. Bush. That is a product of a 12 year refusal of GOP opinion makers and the GOP rank and file to defend the G.W. Bush presidency.
Some particularly here will blame that one Bush, but in fact a modern president can not go out and say casualties were light in a battle. So other must say that for them. Other must point out the housing market problem was caused by Dims and the Bush administration several times tried to nip the problems in the bud and were called racists for their trouble.
The GOP opinion makers were too busy sitting on a couch with Pelosi and such actions to bother to defend a GOP president.