Jill Biden rejects 'ridiculous' concerns on president's mental fitness

Jill Biden is dismissing any concerns about President Biden's mental fitness, calling them "ridiculous."

"I think that's ridiculous," Biden says in an interview for this week's "CBS Sunday Morning." Portions of the sit-down at Camp David with Rita Braver were released Thursday.

Biden shook her head as Braver asked about some recent polling that the CBS News journalist described as showing "quite a few Americans have some questions about the president's current mental fitness."

A Politico/Morning Consult survey conducted last month found that only 46 percent of respondents agree that 79-year-old Biden "is mentally fit," while 48 percent disagreed.

Biden also opened up about her role as first lady being more difficult than she predicted before she entered the East Wing.

"It's a little harder than I imagined," Biden said in a preview clip, when asked if she was prepared for what the role would be like.

Biden chalked up the challenge to the non-stop nature of working in the White House.

"It's not like a job that you do," Biden, a professor at Northern Virginia Community College, told Braver. "It's a lifestyle that you live."

Although she spent eight years as second lady when President Biden was vice president, Biden expressed surprise at not being able to clock in and out of work like in many traditional careers.

"It's not something that you leave at 5 o'clock or at 3 o'clock," Biden, 70, said.

"It's 24 hours a day."

Biden also weighed in on Democrats dropping a tuition-free community college proposal from the president's sweeping social spending plan, saying it wasn't hard to hear the news. "No, I understand compromise," she said.

"And I knew this was not the right moment for it. But that doesn't mean it might not get passed somewhere down the future."