Image credit: Rick Rowell/ABC

As some Democrats waver over whether the country is "better off today than four years ago," first lady Michelle Obama told ABC "World News" anchor Diane Sawyer her answer is yes, and that Americans "are growing to understand just how much we've accomplished."

The first lady pointed to the end of the war in Iraq, a planned departure from Afghanistan, and an economy "on the brink of collapse," that's "now consistently creating jobs."

During an interview today in Charlotte, the Mrs. Obama also touted President Obama's health care reform law.

"Our grandparents can afford their medicine," she said. "Our kids can stay on our health care until they're 26 years old. I could go on and on and on."

Democrats would like nothing more. Michelle Obama is, with former President Bill Clinton, among the party's most popular figures. She may also be the president's most powerful campaign surrogate.

"I didn't think it was possible," she said during her convention speech Tuesday night, "but, today, I love my husband even more than I did four years ago, even more than I did 23 years ago."

Tune in to "World News with Diane Sawyer" and "Nightline" tonight to see Sawyer's full interview with Michelle Obama.