[cnn-photo-caption image= http://i2.cdn.turner.com/cnn/2008/images/08/28/art.mccainad.cnn.jpg caption="McCain is congratulating Obama in a campaign ad Thursday."]
(CNN) - The McCain campaign has finally released the television ad it called "historic" and "exciting" earlier Thursday.
Set to air in key campaign states to coincide with Barack Obama's formal acceptance of the Democratic presidential nomination, the Arizona senator is featured looking directly into the camera to congratulate his presidential
"Senator Obama, this is truly a good day for America," McCain says in the ad. "Too often the achievements of our opponents go unnoticed. So I wanted to stop and say, congratulations."
"How perfect that your nomination would come on this historic day," McCain also says in reference to the 45th anniversary of Martin Luther King, Jr.'s 'I Have a Dream' speech. "Tomorrow, we'll be back at it. But tonight Senator, job well done."
The upbeat ad is a marked departure from the slew of negative commercials the McCain campaign has released all week as it aims to divert media attention away from the Democratic National Convention.
Those ads have directly questioned Obama's readiness to be president, and most feature past criticisms from his chief primary opponent, Hillary Clinton - prompting the New York senator to directly distance her self from them earlier in the week. But Evan Tracey of TNS Media Intelligence/CMAG, CNN's consultant on television ad spending, reports the majority of those ads have yet to air in most battleground TV markets.