Democrats may currently control the Senate, but many within the party believe 52 Democratic senators are necessary for a true governing majority. That’s because moderate Democratic Sens. Joe Manchin and Kyrsten Sinema are reluctant to change the Senate rules and abolish or circumvent the filibuster, which requires a 60-vote supermajority to vote on most legislation. However, suppose the party wins 52 seats this November and at least 50 senators vote to suspend the filibuster in the following Congress. The Senate could then pass stalled Democratic priorities like codifying abortion rights into federal law and expanding voting rights. As a result, that’s where Democrats are setting the bar this election cycle: Even President Biden has publicly asked voters to “give me two more Democratic senators.” But, while Democrats have a 66-in-100 chance of holding onto control of the Senate (according to the Deluxe version of the FiveThirtyEight forecast), their odds of winning 52 seats are dici...