After swings through New England, the South and points West, the four main candidates vying to be the Republican challenger to President Obama gear up for caucuses in three states Tuesday, Colorado being the largest.
Vanessa Hudgens, a cast member in the motion picture sci-fi fantasy "Journey 2: The Mysterious Island" attends the premiere premiere of the film at Grauman's Chinese Theatre in the Hollywood section of Los Angeles on February 2, 2012. UPI/Jim Ruymen
