Sen. Bob Casey (D-PA) believes the solution to the border crisis is to open the floodgates by passing the Senate’s pro-migration border bill, he said in a Tuesday night debate with Republican Dave McCormick. Casey and McCormick spent several minutes of the heated debate sparring over immigration and border security, with Casey — and one of the moderators — spending time deriding Republicans for alleged anti-immigrant rhetoric instead of discussing policies. McCormick’s numbers surged throughout the summer, and the race is now deadlocked with McCormick trending as early voting has begun in the commonwealth. Casey touted the failed Senate bill,...