President Biden has spent more time in Pennsylvania during his presidency than any other state besides his home locale of Delaware, and Democratic party operatives and insiders say he’s clung tight to his birth state for good reason. Pennsylvania is home to a critical midterm Senate pickup opportunity for Democrats in the race between Lt. Gov John Fetterman (D) and Republican Mehmet Oz. The state was also pivotal to Biden’s presidential win in 2020, as well as Democratic victories in the 2018 midterms and — importantly — losses in the 2016 election that put former President Trump in the White...