Program Note: For more on Sen. Arlen Spector's party switch, tune in to AC360° tonight at 10 p.m. ET.
[cnn-photo-caption image=http://i2.cdn.turner.com/cnn/2009/images/04/28/art.obamaspecter.wh.jpg caption="Obama speaks to Specter in a photo released by the White House Tuesday."]
Senior White House Correspondent
The first President Obama heard of Arlen Specter's party switch was at 10:25 am Tuesday in the Oval Office when he was handed a note by a staffer, according to a senior administration official.
The official told CNN Obama was in the middle of his daily economic briefing and was given a note that said simply, "Specter is announcing he's switching parties."
A few minutes later after his meeting wrapped up, the official said, Obama called Specter and said, "You have my full support, and we're thrilled to have you" in the Democratic Party.
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