Nate Silver @NateSilver538
A good rule of thumb is that a VP is worth a net of 20/EV percentage points in their home state, where EV is the number of electoral votes. So, e.g. Pence is worth 20/11 = ~1.8 points to Trump in Indiana. Or Whitmer would be worth 20/16 = ~1.3 points to Biden in Michigan. — PolitiTweet.org