Political and legal history are being made in a Lower Manhattan courtroom as Donald J. Trump becomes the first former U.S. president to undergo a criminal trial.Jonah Bromwich, who covers criminal justice in New York, explains what happened during the opening days of the trial, which is tied to Mr. Trump’s role in a hush-money payment to a porn star.Guest: Jonah E. Bromwich, who covers criminal justice in New York for The New York Times.Background reading: 

• Here’s a recap of the courtroom proceedings so far.
• Mr. Trump’s trial enters its third day with seven jurors chosen.

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