Trump has an approval rating in the 35% range, and has accomplished absolutely nothing except set a new record for the most days on a golf course as president.  He's a failure and an imbecile.  More than half of Americans are now embarrassed to have Trump as president.  Pathetic. 

Mr. Corker may have a chance at this.  He's not a pathological liar or sociopath, which is what Trump voters seem to want, so Corker would need to attract educated voters who want to elect someone who does something other than tweet and play golf.