Mark Kirk has done so 20X more often (constantly giving "bipartisan" support and carrying the water for whatever Obama wants) and a bunch of freepers begged for me to elect that RINO turd in 2010 because "this is the most important election EVER and we MUST have a GOP majority! We can worry about RINOs later"
So here's another example where a guy on the far-left who worships abortion and gay marriage is fine and dandy to have in the GOP caucus if it "helps us get to 51", but a guy who votes conservative 85% of the time is a "liberal socailist" and we need to purge him to "make the Senate more conservative"
I doubt you’ll have to worry about Kirk after the 2016 elections.