Among those pardoned was George Papadopoulos, who was a foreign policy adviser to Mr. Trump’s 2016 campaign and pleaded guilty in 2017 to making false statements to federal officials as part of the investigation by the special counsel, Robert S. Mueller III…

Mr. Trump’s pardon list also included four former U.S. service members who were convicted of killing Iraqi civilians while working as contractors in 2007.

One of them, Nicholas Slatten, had been sentenced to life in prison after the Justice Department had gone to great lengths to prosecute him. Mr. Slatten, had been a contractor for the controversial company Blackwater and was sentenced for his role in the killing of 17 Iraqi civilians in Nisour Square in Baghdad — a massacre that left one of the most lasting stains on the United States of the war.

The three former members of Congress pardoned by Mr. Trump were Duncan Hunter of California, Chris Collins of New York and Steve Stockman of Texas.