William McSwain served as the US attorney for the Eastern District of Pennsylvania from 2018 until January 2021, during the presidency of Donald Trump, who nominated him for the post.

Former US President Donald Trump on Monday on his Telegram channel posted a letter written by ex-US attorney of Pennsylvania, in which the latter slams the Justice Department orders on how to respond to the election fraud allegations.

"On Election Day and afterwards, our Office received various allegations of voter fraud and election irregularities," the letter said. "As part of my responsibilities as U.S. Attorney, I wanted to be transparent with the public and, of course, investigate fully any allegations. Attorney General Barr, however, instructed me not to make any public statements or put out any press releases regarding possible election irregularities."

According to reports, Barr called the election fraud claims "just bulls**t" during a December 2020 meeting in the White House.