Presidential candidate Rick Santorum on Thursday said Republicans should give President Barack Obama another term if Santorum isn't the GOP nominee and for a second day compared rival Mitt Romney to an Etch A Sketch toy. Santorum reiterated an argument he has made before: The former Massachusetts governor is not conservative enough to offer voters a clear choice in the fall election and that only he can provide that contrast. "You win by giving people a choice," Santorum said during a campaign stop in Texas....