CONCORD, N.H. (AP) — Rudy Giuliani isn't convinced that any of the declared Republican presidential contenders can defeat President Barack Obama.

Until he is, Giuliani says he won't rule out a run of his own.

"These are a lot of qualified people," the former New York City mayor told The Associated Press on the eve of his fourth visit to New Hampshire this year. "Do they have a good chance of winning? I don't know the answer to that."