After losing by considerable margins in D.C., Maryland, and Virginia primaries to Barack Obama, Hillary Clinton unveiled an ad attacking her rival yesterday. The voiceover says:

Both Democratic candidates were invited to a televised debate here in Wisconsin. Hillary Clinton has said yes. Barack Obama hasn’t. Maybe he’d prefer to give speeches than have to answer questions.

Like why Hillary Clinton has the only health care plan that covers every American, and the only economic plan that freezes foreclosures.

Wisconsin deserves to hear both candidates debate the issues that matter. And that's...not debatable.

Obama's spokesman told The Caucus, "Senator Obama and Senator Clinton have debated 18 times already and have agreed to two more debates in the next three weeks. It’s telling that Senator Obama is spending the day offering substantive ideas on how to fix the housing crisis, offer relief to middle-class families and end the outsourcing of Wisconsin jobs, while Senator Clinton is playing the same old Washington games." But Obama, with his momentum giving him an air of frontrunner status (though he and Clinton are closely matched in the delegate count so far), faced some criticism from Republican frontrunner John McCain, who called Obama's statements vague.

Other fun facts: Clinton's camp is suggesting the bad weather could have prevented her senior citizen supporters from voting for her yesterday and agreed to the debate on MSNBC, in spite of David Shuster's remarks (course she had to - she apparently loves debates!). Also, a meeting of Clinton donors seemed more like Festivus, sans the feats of strength, as many were frustrated and resentful. And Governor Spitzer, superdelegate who will support Hillary Clinton (see video below), says Obama is "spectacular."