I have lived with the possibility of war in Ukraine for a long time, first as a newspaper columnist, then as a news-letter writer (and a long-ago war correspondent). I wrote against further NATO enlargement soon after Poland, Czechoslovakia and Hungary were admitted – gingerly at first, more firmly once I began covering the Harvard-Russia scandal in the mid-90s. Boris Yeltsin’s selection of Vladimir Putin to be his successor didn’t seem surprising. Unlike Hillary Clinton, I was not shocked when, in 2012, Putin took back the helm from Dimitri Medvedev. Putin wasn’t a tsar, but by then he was steering…