Organizing for Action -- the old Obama campaign apparatus -- is out with its first TV ad, and it defends the federal health-care law.

"What the impact of ObamaCare?" the ad's narrator asks asks. "The truth is, Americans are already seeing the benefits. She's seeing more seniors for free wellness visits. He received a $150 rebate from his health insurance company. And next year, she can expand her small business -- thanks to tax credits that cover up to half of her workers' health insurance."

The ad concludes, "Better coverage and lower costs -- that's what ObamaCare means for them. Get all the facts at BarackObama.com/HealthCare." NBC News has learned the ad is airing on national cable news, and it's part of a seven-figure ad buy over the summer.

This ad comes as the most recent NBC/WSJ poll found that just 37 percent of Americans said the health-care law was a good idea, versus 49 percent who said it was a bad idea.

That 49 percent on bad idea was the highest negative rating on that question since the NBC/WSJ poll began asking it in 2009.

It also comes as the law's opponents have outspent supporters on TV ads by a 5-to-1 ratio since 2010, per Kantar Media CMAG.