Since his acquittal in the Senate, President Trump has undertaken a campaign of retribution against those who crossed him during the impeachment inquiry — while extending favors to those who have tried to protect him. Today, we explore what has happened so far in this new phase of his presidency. Guest: Peter Baker, the chief White House correspondent for The New York Times. For more information on today’s episode, visit nytimes.com/thedaily.  Background reading: Mr. Trump called those who testified against him in the impeachment “evil,” “corrupt” and “crooked.” After he was acquitted, he began firing witnesses.A handful of senators reached out to the White House to warn the president not to dismiss Gordon D. Sondland, the ambassador to the European Union who testified in the House hearings. Mr. Trump removed him anyway.