Has any President ever been elected strictly on qualifications? I think your point omits some of the fatal flaws those candidates possessed that stood between them and the presidency or spectacular issues or poor campaigns that harpooned their run. Whatever the reason though, most of those candidates you previously listed didn't get their party's vote out to the polls. Republicans have had their own issues running viable candidates over the past number of years; Bob Dole, Mit R, McCain, 1 term Bush, Ford. At the end of the day both parties have the same job; counter apathy with-in (motivate your party & those who identify like to show up at the polls, in greater numbers than the opposition which is critical) and sway non-committed voters to your side.