This is the time of the campaign where people might actually pay attention to a campaign ad. So this is the time to run them. Also, I believe this particular ad is genius. It will keep the despicable remarks by HRC about more than 1/2 the nation on the front burner - despite the news cycle being all about her medical issues.
Trump wisely sidesteps the medical issue brouhaha and goes right to the jugular on her "deplorable" comments about regular Americans.
Okay, enough of this ‘half the nation’. Let’s say we are roughly split 50/50 Hillary/Trump. Half of Trump supporters is half of half of the nation. One fourth.