We have vote for Kirk because of the magical R!!
I would not advise voting for Kirk simply because he has a “R” after his name, but the reality is that in some states the best you can hope for is a RINO, and Illinois is one of those states.
Kirk may not come close to passing any purity tests but he would be a much more reliable conservative vote than the democRAT alternative considering that person would vote conservative 0% of the time.
Plus you need to look at the big picture. If we are able to get a Walker or Cruz elected in 2016 than having a republican controlled congress would help them actually implement their agenda much more easily than if you have a democratic controlled senate to muck things up.
I mean if Kirk was running in Utah or Wyoming than sure I would be all on board with kicking Kirk to the curb and finding a more conservative alternative, but the reality is he is running for US senator from Illinois.