Appearing on Current TV's Full Court Press on Tuesday morning, Sen. Ben Cardin (D-MD) warned that unless Americans can undo the Supreme Court's decision in the Citizens United case, the most narrow special interests will end up running the country.

"The super PACs, to me, are stealth funds that com into a state," Cardin said. "You don't know when they're coming in and we're all concerned about it. We know that corporate America is financing most of this."

"This is the special interests," he continued. "This is the people representing some of the most narrow special interests in this country. The Supreme Court, in Citizens United, opened this up. It's wrong. It shouldn't happen. We should have a regulated fund. We already have too much money going into the campaigns now."

This video is from Current TV's Full Court Press, broadcast Tuesday, May 22, 2012.