I don't condone gambling but...

https://www.predictit.org/markets/detail/7456/Who-will-win-the-2024-US-presidential-election

According to this WSJ article, you'll make like $800 if you bet $850 (the max) on Trump winning atm; since Biden is at $0.51/share and Trump is at $0.47/share. You get a dollar per share if your bet wins. Their fees are like 15% (10% commission and a 5% withdrawal fee) though.

There's also Iowa's Electronic Markets which also do election betting: https://iem.uiowa.edu/iem/

The aforementioned WSJ article has a bit more information on both: https://archive.is/eHAEk

don't quote me on any of this because I historically lose like $100 on blackjack everytime I'm in a casino and wind up morosely drinking watered down gin sours for the rest of the night at the penny slots while my friends go 'just go back and gamble a bit more you were literally at a $5.00 buy in table & can lose more than $100.00' lmao