The political universe of conservative talk radio does not constitute anything close to a majority of voters in the general election.
In fact, this cartoon version of conservatism tends to alienate key groups of voters, including minorities, Republican women and the college educated.
Much (not all, but much) of the new conservative establishment feeds outrage as its source of revenue and relevance. It is a model that has been good for Rush and Fox, but bad for the GOP.
I'm no fan of Gerson, but enemy of my enemy and all that.