They also complain that libertarians are closer to liberals than they are to conservatives, but they count every vote a Libertarian candidate got as one a Republican would have gotten if there hadn't been a Libertarian to vote for.
As with Perot, there are plenty of voters who voted third party that would have never voted Dem or GOP. Ever.
But they'll vote for someone else who tells them what they want to hear.
Yet the Dems and GOP treat each vote as something they are entitled to instead of something they have to earn.