President Biden threw his endorsement behind a ban on congressional stock trading in a new interview released Tuesday.

“I think we should be changing the law,” Mr. Biden said in an interview with Faiz Shakir, a political adviser for Sen. Bernie Sanders, Vermont independent, for A More Perfect Union. “Nobody in the Congress should be able to make money in the stock market while they’re in the Congress.”

It’s unclear what prompted the president to comment on the issue now, in his lame duck period. A bipartisan group of senators pushed for a ban on stock trading in July for members of Congress and their families. It has not received a vote yet.

Currently, the law requires lawmakers to disclose when they trade stocks exceeding $1,000, but some have said the rule is poorly enforced.

Mr. Shakir noted in the interview that Mr. Biden did not own any stock when he was a senator.

Mr. Biden said that he was “listed as the poorest man” in Congress.

“I never thought I was poor. I had a salary that a senator made,” he said. “I don’t know how you look your constituents in the eye and know because [of] the job they gave you, gave you the inside track to make more money.”

• Mallory Wilson can be reached at mwilson@washingtontimes.com.