This is meant only for informational purposes:
As per Odds Shark, today's moneyline for a Trump v. Biden contest has Trump at +160. That means Trump is the underdog. For every $100 you bet on Trump to win, and he does, you get back $160, plus your $100 stake. For a total return of $260. Joe is at -190. The minus sign mean he's the current favorite. For every $100 you bet on him to win, and he does, you get $90. Plus your original $100. Total return is $190.
Election betting is illegal within US borders. And the off-shore betting sites won't accept election bets from US residents. (Or at least they're not supposed to.) Odds change every day. But if anyone thinks Donald Trump will be reelected, and has a buddy in Canada, or the Caribbean, or another foreign country willing to place a bet for you, you can more than double your money if he wins.
2020 Presidential Election Betting Props