Lots of Christian conservatives have turned away from Trump and have a chance of voting couch over him. Now if there's a chance a gay man might be president it may motivate a lot of people to get up and keep the gay man from being in charge. Nothing motivates voters like fear or hate. The left would have to be 100% behind him and foaming at the mouth to go out and vote, or else it'd be a win for the Rs. That being said, a black woman carries a slightly less chance of that. The racists are already 100% behind trump and motivated to get Mr. Very Fine People on Both Sides back in the oval office.
I'd vote Pete though... I was hoping he'd get the 2020 nomination.
There has been some gurgling from (very few) faith leaders, but polling show an increase in conservative Christian support for Trump.
The bigger concern might be minority voters. Polling suggests a gay candidate could lose some support from some minority communities, namely African Americans.
That being said, it's a problem anyway. Biden has lost a lot of black voters. Polling shows Trump has more support from likely black voters than any republican candidate in the last 60 years.
And just imagine the optics of old, orange felon vs. this guy.
I think he also ticks the box for people that want "normalcy." He is just very much an articulate, succinct, polished communicator/politician. And he's a white guy, which, sadly, gains him free extra votes automatically.