Okay, let’s break those odds down.
A coin flip is -115 (if you bet $1.15 and are correct, you win $2.15, for a net profit of $1.00).
With that -15 correction in mind…
Donald Trump is being given a 100/(120+100+15)=100/235 = 42.6% chance of being reelected.
Warren is being given a 100/(250+100+15) = 100/365 = 27.4% chance of being elected.
Biden is being given a 100/(800+100+15) = 100/915 = 10.9% chance of being elected.
Sanders is being given a 100/(1600+100+15) = 100/1715 = 5.8% chance of being elected.
Moving down the page, on Sept. 17, they would have given Trump a 45.5% chance of being elected. Sanders, on the other hand, has dropped from a 9.0% chance on Sept. 17.
Impeachment is dead even; not sure if that counts removal or just the House voting to impeach. If it’s the former, I’d sell (no way it’s as high as 50% to remove him); if it’s the latter, I’d buy (no way it’s as low as 50% for the House to vote to impeach),
The Republican nominee one is interesting, because they’re using a much smaller cut; add it all up, and Trump has about an 81% chance of being the nominee.
As for party politics, they’re giving a 45.7% chance of a Republican President being elected in 2021.
And that’s an interesting number in itself, because if Trump were equally likely to be elected as any other Republican nominee, that wouldn’t be the correct number. 0.457 x 0.81 = 0.37, or what should be a 37% of Trump getting reelected, compared to a 42.6 percent chance that they’re actually giving. Trump is more likely to be re-elected than he would be if “Trump is the nominee” and “a Republican President gets elected” were independent variables.
So, how likely is it that a Republican gets elected in 2020 if Trump isn’t the nominee?
The possibility that Trump is elected makes up 0.426 of the 0.457 probability that a Republican nominee is elected, or 93.2% of that chance. As a reminder, there’s only an 81% chance he’s the nominee in the first place.
The chance that they’re giving for a non-Trump Republican winning, if nominated, is 0.031/0.19 = only a 16.3% chance of election.