Today on "Special Report":

President Bush (search) calls on his Democratic rival to back up his assertion that unnamed leaders want Kerry (search) to win this November.

GUEST PREVIEW: How will the power shift in Spain (search) play out on the world stage? We'll ask Dennis Ross, former Middle East Envoy and Fox News Contributor.

Wendell Goler reports: President Bush renews his pledge to work with allies like Spain to bring justice to terrorists -- At the same time a new foreign terror threat emerges. We'll have the details.

Bret Baier reports: Things are looking good, and they are only getting better -- So say some Iraqis. We'll have a full report.

Mike Emanuel reports: Ousted Haitian President Jean Bertrande Aristide (search) is back in the Caribbean -- And is not backing down on claims that he was kidnapped.  

Carl Cameron reports: Kerry finds himself on defense of Bush attack on day of Ill. Primary. We'll have the fallout.

Jennifer Griffin reports: Israeli troops at a West Bank checkpoint arrested an 11-year old boy yesterday for trying to smuggle a bomb out of Nablus. Get the full story.

Details on those stories and more on Special Report with Brit Hume at 6 p.m. ET.

— Guests and topics are subject to change