Sen. Jim DeMint (R., S.C.) is now one of the most powerful forces in the Republican party, whether his colleagues in the Senate Republican leadership like it or not. And based on quotes like this, I’m going to guess the answer is “not.†To ABC’s Jonathan Karl: I asked Senator DeMint if he’ll have any regrets if come November 3rd he realizes Republicans blew their chance at winning a majority because some of the candidates he supported lost.“No. I’ve been in the majority with Republicans who didn’t have principles and we embarrassed ourselves and lost credibility in front of the...