Barack Obama used to live in Somerville - I wonder if he ever went to Fenway Park [map], or, as he might put it, Funway Park. Once again, the president has tried to pass himself off as a regular guy, a Joe Sixpack who likes nothing better than to crack open a Bud and listen to a game from . . . Cuminski Park. Cuminski . . . rhymes with Alinsky. As in “Saul Alinsky.” Yes, that’s right, the president talked about “Cuminski” Park again Monday at the Washington Nationals’ home opener, at which he threw out the first pitch...