i think they're afraid. that's not a sign of strength. you want to eliminate elections? you want to take away the will of the people? you don't do that if you're a big, strong guy. >> joe walsh is not right about a lot of things but he's kind of got a point there. while statistically none of the challengers is really threatening trump's renomination right now, consider this statistic. since 1976 no incumbent president who faced a serious primary challenge has gone on to win re-election. not one. here's ow vanity fair's peter hanby put it. if trump's fitness for office becomes a viable conversation piece among republicans and republican leaning independents for even just a few weeks next january or during the primaries in february they will have accomplished something that nobody in politics has even bothered to attempt this campaign year -- talking to certainty right swing voters who are uncomfortable with the man in the white house.