House Majority Whip James Clyburn (D-S.C.) said Sunday that he does not see himself supporting Alvin Greene, the surprise Democratic nominee challenging Sen. Jim DeMint (R-S.C.).

Clyburn charged last week that Greene was likely a "plant" in the race. "I never said he was a Republican plant," he said Sunday on CNN's "State of the Union."

"I said he was someone's plant. And it turned up after the elections, we found out, as I said earlier, something untoward was going on."

Clyburn said that the campaign manager of Rep. Joe WilsonJoe WilsonGOP worries as state Dems outperform in special elections Navy official: Budget, readiness issues led to ship collisions Obama left nuclear waste in South Carolina, Trump can clean it up MORE (R-S.C.) was also managing the campaign of his primary opponent.

"I saw the patterns in this," Clyburn said. "I know a Democratic pattern, I know a Republican pattern, and I saw in the Democratic primary elephant dung all over the place.

"And so I knew something was wrong in that primary," the congressman continued. "And this result tells us that. People intentionally circumvented the law, the rules and regulations, did not file any disclosures, did not file any of their campaign finances, yet they spent hundreds of thousands of dollars running this campaign and broke every law."