Sure, but it wouldn’t be the first thing. When humans became seafaring the same diffusion of mates happened. It was then exacerbated by the invention of the train. And then even further with airplanes. And in the digital age people meet each other online despite living thousands of miles away.
Becoming space faring would also exacerbate the issue, but it wouldn’t be the start.
The democrats will just pick another stinker. How do you think we got Biden in the first place?
The two party system needs to be fixed before we will see any actually good candidates.