WEEK’S END Will the last potential GOP contender for 2012 to commit adultery please turn out the lights?  The fellow at the next desk quips that, at this rate, Sarah Palin will win the 2012 presidential nomination by default, because all the Republican men have girlfriends . . . .Unless, of course, it turns out that she does, too. On Thursday a bunch of folks—including some from Richmond—rallied in D.C. to demand government health care. Noticeably absent from news coverage of the event was the insinuation, frequently leveled at April’s Tax Day Tea Parties, that the whole supposedly grassroots shebang was mere agitprop whipped up by powerful interests in Washington.