Advance excerpts of vice presidential nominee Paul Ryan's remarks at an AARP event in New Orleans today show that he will devote much of his time to attacking President Obama's health-care plan as dangerous for seniors. 

"The first step to a stronger Medicare is to repeal Obamacare, because it represents the worst of both worlds," he plans to say. "It weakens Medicare for today’s seniors and puts it at risk for the next generation. First, it funnels $716 billion out of Medicare to pay for a new entitlement we didn’t even ask for. Second, it puts 15 unelected bureaucrats in charge of Medicare’s future."

Under the Republican plan, he argues, "seniors can always afford Medicare coverage – no exceptions."

The same cuts to future Medicare spending are in Ryan's budget, a proposal he and Mitt Romney have avoided discussing on the trail. 

Obama is out with a new ad focused on the Ryan budget, saying it would turn Medicare into a "voucher system" that could raise seniors' costs by up to $6,400 a year. But that attack relies on an outdated, less generous version of Ryan's plan. The ad is airing in Colorado, Florida, and Iowa.