In Massachusetts, we'd be better off if the Republican Party disbanded, and the Democrats aligned into two groups...fiscally somewhat conservative vs. totally nutty about spending.
Mitt Romney is no better; he ignored the convention in his preference for Lieutenant Governor. I most probably won't vote for him, unless he finds a way to get Kerry Healey off the ticket and Jim Rappaport on.
In a situation like this, it is hard for a principled conservative voter to choose whether or not to vote for the RINO who doesn't deserve the job and add to the probability of a Democrat winning, or vote for the Libertarian in the hope that this will give a loud signal to the Republican Party in Illinois to become more conservative and less big government.