There's a difference between politicians trying to cover their butts and talking heads constantly spinning yarns of conspiracy and finger pointing and bravado. Trump will often make claims with little or no reference, or a reference like a tabloid, or a personal encounter or eyewitness event others don't corroborate. And he reverses himself constantly.

In fact, try this. Find 5 claims he has made against Clinton, then ask yourself if Clinton made a mirror opposite claim back to him with the same basic level of evidence he uses what would you think? If she said he created ISIS, or Trump Foundation was a money/power launder front, or he's just playing the white man card, or even that he was a corrupt businessman, etc, how ridiculous would all those sound and how hard would you be on her for throwing those claims out there? Heck, there are claims he makes about her which in reverse toward him may actually be true (like the corrupt businessman) yet you're willing to take his smears as facts at face value.

I would explain why, but John Oliver did a better job than I could. Watch the video -- even if you disagree (i.e you are wrong about something), it's funny.