Barbour Won't Rule Out 2012 Run By THE ASSOCIATED PRESS Published: February 19, 2010 WASHINGTON (AP) -- Minnesota Gov. Tim Pawlenty and Indiana Rep. Mike Pence, two possible 2012 presidential candidates, called for a return to conservative principles before a critical constituency Friday, while Mississippi Gov. Haley Barbour wouldn't rule out a White House bid of his own. ''If you see me losing 40 pounds that means I'm either running or have cancer,'' quipped Barbour, a former lobbyist and GOP chairman who Republican insiders say could be a formidable candidate. The head of the Republican Governors' Association, Barbour made the...