As Mitt Romney and Newt Gingrich continue to battle for the GOP presidential nomination, the race turns to the states of Colorado and Minnesota, where caucuses will be held Tuesday. A Public Policy Polling survey shows Mitt with a giant lead in Colorado, while Minnesota is seen as a toss-up. After that, Maine is next, on Saturday. Gingrich, who just lost Nevada to Romney by double digits, said his goal was to “find a series of victories which by the end of the Texas primary will leave us at parity” with Romney. The Texas primary is on April 3. Better get moving, Gingrich.