UPDATE: Obama spokeswoman Jen Psaki tells the Buzz: "We asked the cable channels if we could prevent the ad from airing in Florida and we were told that would be impossible."
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CNN and MSNBC viewers in Florida today are seeing a Barack Obama campaign ad, which is part of a national cable TV buy. Remember, though, that pledge not to campaign in Florida ("Campaigning” for purposes of this section includes, but is not limited to, purchasing print, internet, or electronic advertising that reaches a significant percentage of the voters in the aforementioned state").

"There is no question that these ads are a clear and blatant violation of the early state pledge that Sen. Obama and the other leading Democratic candidates signed last year,'' said the Clinton campaign. "Just last week the Obama campaign snubbed the people of Floridain a memo that stated that Floridadid not matter in the nominating process.  After consecutive losses in New Hampshire, Michiganand Nevada, they appear to be changing course. Sen. Obama’s flagrant disregard for the pledge that he signed is disturbing and calls the integrity of the pledge into question."