The Pennsylvania Republican will “be defined by two things,” the advisor said.

The first is a comparison to Barack Obama: “He’s never run anything,” said the advisor. The Pennyslvanian’s experience is limited to roles as a legislator and legislative staffer. “The biggest thing he ever ran is his Senate office,” he siad.

The second is a challenge to Santorum’s Washington experience.

“They’re going to hit him very hard on earmarks, lobbying, voting to raise the federal debt limit five times,” said the advisor. “The story of Santorum is going to be told over the next few weeks in a big way.”