Maricopa is half of Arizona, which is a key swing state.
Actually over 2/3 of Arizona. Bigger than e.g Cook county. Bigger than half of the states!
But, the Republicans are holding their vote until Nov 3, Dems vote by mail. So this looks actually great.
Mailing votes went out a while ago, if you wanted to vote by mail, you have already send them and they are in.
People who did not send them yet, either will not vote or they are holding to them for some reason - not trusting mail e.g., wanting to vote in person etc.
If the latter looks like Republican voter, you would be right. Heck, I have not voted yet!