The most important thing is to take control of the Senate away from Harry Reid and the Democrats. If that happens, who is sitting in the White House becomes less relevant.
If the Republican machine can designate their nominee without listening to the voice of the people - and it's clear that is their intention - then the voice of the people will have to find another way to become heard.
Having Obama back in the White House for another four years with a Republican controlled Senate and House would result in some level of gridlock, with Obama vetoing a lot of legislative efforts. This outcome might be better than handing full control of our government over to a big political machine that has only it's own best interests at heart.
I honestly don't think I can stomach voting for somebody as bad as Obama, but I can sympathize with those who might. And it would be almost as unsettling to have to vote for Romney to beat Obama, specially if Romney hasn't earned the chance, but has just been shoe-horned in by the Republican machine.
This is the reason why the Tea Party exists - because some of us can't stand the big party politics, including Republicans who just want the status quo of big government, big taxes, big power, big crony-capitalism and big corruption.
but I can sympathize with those who might.
________________
I absolutely do not sympathize and consider them Marxists just like he is.