We all have heard about this by now, but The Politico's Jonathan Martin confirms it: Mitt Romney's campaign is trying to weed off John McCain's older Florida supporters by bashing him for voting against the biggest entitlement in the history of America. Mitt Romney's campaign is sending out automated phone calls to Florida Republicans attacking John McCain on taxes and Social Security, an aide to the former governor confirms... "John McCain voted against the AARP-backed Medicare prescription drug program," the call notes, in an obvious effort to give seniors pause about the senator. There are any number of things you...