Much has been made this election of the "undetected" voter, from new voters to cell-phone voters. But there is another undetected voting block that will make a crucial impact on this election: Serbian-Americans. There are up to two million Serbian-Americans, about a million of them registered voters. It is estimated that two-thirds of them are concentrated in seven battleground states: in Ohio (esp. Cleveland), Wisconsin (Milwaukee), Florida, Missouri (St. Louis), Pennsylvania, Michigan (Detroit), and New Jersey. In the past they had been split along party lines, with a slight majority favoring Democrats. Not this year. Thanks to a “get-out-the-vote” campaign...