In an election likely to be decided by a razor-thin margin, across a landscape that consists of a small group of battleground states, both campaigns are leaving no rock unturned in the hunt for every vote. The recent fixation on the Polish American vote is a prime example. As she made her case for the defense of Ukraine in the Sept. 10 presidential debate, Kamala Harris made an explicit nod to “the 800,000 Polish Americans right here in Pennsylvania” who should be worried about the threat to...