Pennsylvania primary voters will cast ballots Tuesday in a series of critical races in the key battleground state, even as both the presidential and Senate primaries are mere formalities. They include a bitterly fought Democratic primary around Pittsburgh and a primary in eastern Pennsylvania that features a moderate Republican seeking to fend off a right-wing challenger. What’s more, activists upset with President Joe Biden’s handling of the Israel-Hamas war are urging Democrats to write “uncommitted” on the state’s primary ballot. And in the GOP primary, Republicans looking to cast protest votes against former President Donald Trump can still find former...