The New York Times reports today — based on unclear sourcing — that Mitt Romney has endorsed a strategy of raising doubts about Newt Gingrich’s “emotional stability.” Well, if that’s the case, here’s Exhibit A. A Florida source passes along a mailer that the Romney campaign — not the pro-Romney Super PAC; his campaign — just dropped in the state, and it comes as close as possible to making that case, hitting Gingrich as “erratic” and “reckless.” The mailer also prominently features a quote from my colleague Jennifer Rubin, describing Gingrich’s “well of sleaze.” Here’s page one: (GRAPHIC AT LINK)...