Actually as someone told me recently when I was railing about about O turd and the coming election: They are all the same guy, that is what you don’t see. They have one agenda, the professional elected government.
I think it's more sinister than that. It's not just about getting elected. It's about ideology. It's about democrats making sure they get a democrat in the oval office, whether he runs on the democrat ticket or the republican ticket.
It's the only explanation I can see for why the Republicans are about to nominate a non-Christian, father of Obamacare, anti-gun rights, pro-"sodomy is marriage too", pro-abortion candidate.