Worse is the prospect that one of them might somehow win. Very few presidents are so terrible that they genuinely endanger their own nation, but Trump and Cruz would go there and beyond. Trump is a solipsistic branding genius whose "policies" have no contact with Planet Earth and who would be incapable of organizing a coalition, domestic or foreign. Cruz would be as universally off-putting as he has been in all his workplaces. He's always been good at tearing things down but incompetent when it comes to putting things together. So maybe it's time for Establishment Republicans to actually do...