Republicans exhaled this week when vulnerable Rep. Michele Bachmann, R-Minn., announced her retirement from the otherwise reliable GOP district. Their relief might not last long. In Minnesota, some Republican strategists fret that the state party's quirky endorsement process could yield a “Bachmann 2.0” candidate — and put the seat in play again. “The wrong candidate could lose this for Republicans,” said former Rep. Mark Kennedy, the Republican who preceded Bachmann in the 6th District. “And that would be a key concern for whether the endorsing process delivers the right candidate.” (more…)