Roger Stone, a longtime Republican campaign adviser and confidant of US President Donald Trump, was sentenced to 40 months in prison on Thursday.

Stone was found guilty last year of lying to Congress and threatening a witness regarding his efforts for Trump's 2016 campaign.

Prosecutors had initially asked Stone to be sentenced to seven to nine years in prison, resting that recommendation on the severity of his crimes and behavior. Trump called that ask "very unfair" in a late-night tweet. Attorney General William Barr overrode the recommendation the next day, saying seven years in prison would be too harsh.

During the 2016 campaign, Stone sought to spread smears about Hillary Clinton and openly bragged of being in touch with WikiLeaks and its founder Julian Assange. Congress called him to testify, and he covered up discussions he had with Trump campaign officials about trying to reach Assange and efforts he made to use another associate of his as a WikiLeaks liaison.

Stone, with then-presidential candidate Ronald Reagan, visits a Chrysler plant in Detroit in September 1980.
Stone, with then-presidential candidate Ronald Reagan, visits a Chrysler plant in Detroit in September 1980.
Robert R. McElroy/Getty Images
Stone, left, and fellow Reagan campaign operatives Ed Rollins and Lee Atwater discuss a meeting they had with former President Richard Nixon during Reagan's re-election campaign in November 1984.
Stone, left, and fellow Reagan campaign operatives Ed Rollins and Lee Atwater discuss a meeting they had with former President Richard Nixon during Reagan's re-election campaign in November 1984.
Ira Schwarz/AP
This undated photo shows Stone with former President Nixon.
This undated photo shows Stone with former President Nixon.
Roger Stone/From Facebook
Stone, center, is pictured with Paul Manafort, left, and Atwater in March 1985.
Stone, center, is pictured with Paul Manafort, left, and Atwater in March 1985.
Harry Naltchayan/The Washington Post/Getty Images
Stone and designer Alan Flusserare seen at the Alan Flusser Boutique in New York in August 1987.
Stone and designer Alan Flusserare seen at the Alan Flusser Boutique in New York in August 1987.
Ron Galella/WireImage/Getty Images
Stone, then a volunteer adviser with Bob Dole's presidential campaign, poses with his second wife, Nydia, in their Washington home in September 1996.
Stone, then a volunteer adviser with Bob Dole's presidential campaign, poses with his second wife, Nydia, in their Washington home in September 1996.
Ron Edmonds/AP
Donald Trump, next to Stone, speaks to reporters outside the federal courthouse in Newark, New Jersey, in October 1999. Stone was director of Trump's presidential exploratory committee. They were at the courthouse for the swearing-in of Trump's sister as a federal appeals court judge.
Donald Trump, next to Stone, speaks to reporters outside the federal courthouse in Newark, New Jersey, in October 1999. Stone was director of Trump's presidential exploratory committee. They were at the courthouse for the swearing-in of Trump's sister as a federal appeals court judge.
Daniel Hulshizer/AP
Stone signs copies of his book, "The Man Who Killed Kennedy: The Case Against LBJ" in December 2013.
Stone signs copies of his book, "The Man Who Killed Kennedy: The Case Against LBJ" in December 2013.
Vallery Jean/Getty Images
Stone sits at his office desk in Florida.
Stone sits at his office desk in Florida.
Carl Juste/Miami Herald/Tribune News Service/Getty Images
Stone talks to reporters outside a New York courtroom in March 2017. Stone was being sued over a flyer sent to 150,000 New York households that called Warren Redlich, the Libertarian Party candidate for governor, a "sexual predator."
Stone talks to reporters outside a New York courtroom in March 2017. Stone was being sued over a flyer sent to 150,000 New York households that called Warren Redlich, the Libertarian Party candidate for governor, a "sexual predator."
Seth Wenig/AP
Stone poses with a 2000 poster of Donald Trump in his office in Florida.
Stone poses with a 2000 poster of Donald Trump in his office in Florida.
Andrew Innerarity/The Washington Post/Getty Images
Stone speaks at the American Priority Conference in December 2018.
Stone speaks at the American Priority Conference in December 2018.
Drew Angerer/Getty Images
Stone and Alex Jones, the right-wing conspiracy theorist and talk-show host, speak to reporters outside the House Judiciary Committee in December 2018.
Stone and Alex Jones, the right-wing conspiracy theorist and talk-show host, speak to reporters outside the House Judiciary Committee in December 2018.
Sarah Silbiger/The New York Times/Redux
Stone shows a tattoo on his back of former President Nixon.
Stone shows a tattoo on his back of former President Nixon.
Mark Peterson/Redux
Stone walks out of a federal courthouse following his hearing in Fort Lauderdale, Florida, in January 2019.
Stone walks out of a federal courthouse following his hearing in Fort Lauderdale, Florida, in January 2019.
Lynne Sladky/AP
Stone arrives for his sentencing hearing in February 2020.
Stone arrives for his sentencing hearing in February 2020.
Samuel Corum/EPA/Shutterstock