And that was Ron Paul. The Republicans had a false premise in their campaign strategy. I have heard Rush Limbaugh say a number of times, what choice do they have? Who are they going to vote for? Like there were only 2 choices available to voters. I don't think they considered the third choice, not voting at all. That's essentially what happened, fewer people voted for Obama in 2012 than they did in 2008.
The Republicans picked a candidate that was, in their estimation, good for the party and the parties big campaign donors, not a candidate that was good for the country.