An adviser to President Barack Obama is defending Obama's comment yesterday that "you can't change Washington from the inside."

David Axelrod (CNN)

David Axelrod tells NBC that Obama was saying that in order to "move Washington" you need to "enlist the American people."

FULL COVERAGE: 2012 Presidential Campaign

Mitt Romney is seizing on Obama's comment, telling supporters he "will change Washington" and "get the job done from the inside."

Obama is making a play for older voters today as he addresses the AARP convention via satellite.

His campaign also has released an ad that attacks the Republican ticket's plan for Medicare.

Romney will continue delivering a message of change at a campaign rally today in Nevada. Nevada is a state hard hit by the nation's housing and unemployment woes.