Santorum says Pennsylvania is 'must win' for him

Republican presidential hopeful Rick Santorum told diners in Carnegie, Pa., on Wednesday that May “looks very, very good” for his campaign, but admitted the Keystone State primary later this month is a “must win” if he has any hope of remaining in the race.

Pennsylvania’s April 24 contest will not be an easy victory for Santorum, who Tuesday night watched front-runner Mitt Romney sweep the Maryland, District and Wisconsin primaries and leap even further ahead of him in the race for convention delegates.