QUOTE OF THE DAY…. Sen. Bob Corker (R-Tenn.) has shown slightly more willingness to play a constructive role with Senate Democrats than nearly all of his GOP colleagues. It’s not especially impressive, but given the rest of his caucus, he benefits from the soft bigotry of low expectations.

Sen. John Thune (R) of South Dakota, a member of the Senate Republican leadership, thinks he knows why Corker is willing to occasionally break party ranks and work with Dems.

“I think he’s a guy who’s willing to get down into the weeds,” said South Dakota Sen. John Thune, who is No. 4 in GOP leadership. “Because [Corker] immerses himself in that and understands it so well — the positions he adopts may not always be the ones that everyone else in our conference comes to.” [emphasis added]

So, let me get this straight. Republicans who actually “understand” public policy are the ones who work with Democrats? The reflexive GOP opposition to everything Dems recommend is a reaction from those who aren’t thinking about substance? What does that say about the rest of the Republican caucus, which refuses to engage in bipartisan talks?

By Thune’s logic, the positions of the Republican conference are shaped by those who don’t think too much about policy details. Good to know.

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Follow Steve on Twitter @stevebenen. Steve Benen is a producer at MSNBC's The Rachel Maddow Show. He was the principal contributor to the Washington Monthly's Political Animal blog from August 2008 until January 2012.