Our convoluted primary system evolved to allow voters a more direct voice in choosing a candidate who can win a general election. Voters don’t always choose wisely -- after all, one party always loses. It’s a shame then -- in what should be a Republican year -- that GOP primary voters appear to want to lose the presidency once again.If the candidate at the top of the ticket is roundly defeated, the toll could also take down many Republicans running for the House and the Senate.The latest polls show that only one Republican candidate has a sure chance of...