When was the last time someone talked seriously about courting the Italian vote, or the Irish, in a national election? Kennedy–Nixon in 1960? “Italian” and “Irish” are no longer considered in pollsters’ demography. They melted into a pre-existing electoral block, ineptly called “white voters.” Pollsters talk a lot about the “white vote” — but what they really mean is the Italian-Irish-Polish-Hungarian-Romanian-Jewish-Russian-Swedish-Norwegian-French-Dutch-Scottish-Welsh-English vote. That’s the nature of the American melting pot. And before too long, that ethnically indistinct pot will include Latin-Americans too — Latin-Americans being the immigrant group that, after WW2, supplanted Italians as the largest. I don’t buy the...