In a bid to stop Independent candidate Jack Davis from siphoning off votes, New York Republican Jane Corwin labeled him an ally of national Democrats in a new TV ad.

Davis, who is running on the Tea Party line in the 26th district special election, ran for Congress previously as a Democrat. In its 30-second spot, Corwin's camp says he was a "handpicked candidate" by House Minority Leader Nancy Pelosi (Calif.) to run.

With a recent poll showing Davis taking 23 percent of the vote, Republicans are worried he could be a spoiler in the May 24 vote.