MADISON, Wis. (AP) -- None of the five remaining undecided superdelegates from Wisconsin committed Wednesday to supporting Barack Obama or Hillary Rodham Clinton.

The focus on undecided superdelegates is sharpening after Obama's North Carolina win on Tuesday moved him closer to securing the Democratic presidential nomination.

Superdelegates can support whoever they want. Their votes will be needed for one of the candidates to get the number of delegates needed to secure the nomination.

U.S. Sen. Russ Feingold and University of Wisconsin-Madison student Awais Khaleel both say they are still undecided.

The other three superdelegates did not immediately return messages Wednesday.

Nine of the state's superdelegates support Obama and two are for Clinton.