Doh. OK, that's a dumb one on my part. Gerrymandering is a really bad thing, but in this case that's totally the wrong thing. I was thinking of the...eesh, what's it called? "State counts all its votes for whoever got the most, no matter the margin". Is that past-the-post? I can't begin to think of what its called. Aside from discounting lots of votes, it makes it very hard to defeat a 2 party system.
And "the USA would not have existed" is kinda besides the point. Its still has no part in a "fair" election system.
The 14th amendment clearly should disqualify Trump. Its obviously not actually going to, but somehow suggesting we follow that particular rule from the constitution is unfair?