Marty is Rubio..
or a transgendered Nikki ( McFly ) Haley. 😃
I’d go for either one.
But Rubio and Nikki are largely Trump supporters. I would vote for Pete Buttigieg as Marty and Dr. Fauci as Dr. Brown. I'm sure you agree that Trump would call Pete a "butthead" if he met him. 
Eh, I don’t know. Both being Republicans, they probably have a kind of tribal support for him in public and so are hesitant to really lay into him. But I’d be willing to bet you that over their private family Thanksgiving meals, any questions asked them concerning their feelings towards Trump would be answered in a less than flattering way.
On the Democratic side, I’d be happy if Marty turns out to be Andrew Yang or Tulsi Gabbard..both impressed me. Buttigieg was cool in the beginning, but later on came out with some statements I found to be politically extreme.
I'm sure you agree that Trump would call Pete a "butthead" if he met him.
Undoubtedly. In fact, I’m surprised it didn’t come out in a tweet.