[cnn-photo-caption image= http://i2.cdn.turner.com/cnn/2008/POLITICS/10/29/campaign.muscle/art.obamatrail.gi.jpg caption=" Sen. Barack Obama aired a 30-minute campaign ad Wednesday night."]
WASHINGTON (CNN) - Sen. Barack Obama's 30-minute TV ad, which ran simultaneously on broadcast and cable networks at 8 p.m. ET Wednesday, is muscle-flexing that has little precedent, a campaign advertising expert said.
"It's evidence, if you needed any, that the Obama campaign has more money than there is ad time left to buy," said Evan Tracey, director of the Campaign Media Analysis Group. "This is flexing the muscles."
Tracey estimates that it will cost the campaign "in the $4 to 5 million range - at a minimum, $3.5 million."
But, he said, spending the money is a "no-brainer" for the Democratic presidential hopeful.
"The strategic brilliance of this for Obama is that he is going to consume about 24 hours of the news cycle," Tracey said. "It boxes [John] McCain in, takes the oxygen out of the room."
In the carefully produced infomercial, Obama laid out his plans for the economy and for bringing an end to the war in Iraq.