Barney Frank was one of the people most responsible for overhauling financial regulation after the 2008 economic crisis. After retiring from Congress, he supported a change to his own law that would benefit midsize banks, and joined the board of such a bank. Last week, that bank failed. David Enrich called Mr. Frank and asked him to explain.Guest: David Enrich, the business investigations editor at The New York Times.Background reading: Officials with Signature and Silicon Valley banks, which regulators seized in recent days, had called for looser financial requirements for midsize banks.Here’s why people are worried about banks.For more information on today’s episode, visit nytimes.com/thedaily. Transcripts of each episode will be made available by the next workday.