Well, if Trump hated George W. Bush he has now found a “president” he hates even worse. Sooner or later he is going to be forced to explain his penultimate antipathy to Bush, and whether it involves substantial issues that would make Trump unacceptable as president.
1. Huge deficits
2. Kissing Chinese Communist ass
3. Expensive wars
And Obama has been worse on all three, so Obama is worse.