If Uncle Joe runs, that would keep Hillary out of the race, so YES, that would be a good thing. 

The Democrats need ISSUES as well. You know, ideas and such ... they have single payer healthcare and that's about it. Oh yeah, and all the anti-Trump stuff they'll manage to come up with. They have that in spades. 

If the economy is doing well in 2020, Trump wins a second term. Bank on it.