Ad hominem logical fallacy? You’re describing the Trump campaign modus operandi.
It’s not ad hominem when the definition of something is obviously and objectively true and backed up with objective data - i.e we are governed by incompetent people/19 trillion debt, Bush is low energy, etc.
Here’s part what’s going on with Trump;
Bill Mitchell @mitchellvii - 3 hours ago
Beginning his campaign with a gruff, aggressive style, Trump has set himself up for a classic redemption arc as he grows in statesmanship.
That is completely different from the name calling we see here. Trump thinks so far ahead most people can’t figure out what he’s doing. He’s both a tactical and strategic thinker. I haven’t ever seen a candidate as good at that. Look at how Hillary got smoked when bringing up penchant for sexism, and that tactical battle isn’t over yet. It went the way it did because of the strategic thinking skills used before the tactical battle took place. Trump had it all thought through - it was not knee jerk spur of the moment reaction.
Scarborough MSM Won’t Mention Bill Clinton Jeffrey Epstein Connection—But Donald Trump Will
https://www.youtube.com/watch?v=nCP4EmblCkA