The big problem for the Republican/conservative/libertarian side is that almost everyone on the planet has heard of Hillary, but less than 5% have ever heard of any Republican candidate except for "Bush". The name "Clinton" is associated with 8 years of (relative) peace, (relative) prosperity, and sex with younger women. That's going to be difficult to surmount. I wonder about Hillary's health, but I doubt the media will find that as interesting as asking the Republican candidates countless inane questions.