WASHINGTON — President Donald Trump’s former campaign chairman Paul Manafort is going to jail. On Friday, Manafort was ordered into custody after a federal judge revoked his house arrest, citing newly filed obstruction of justice charges. The move by U.S. District Judge Amy Berman Jackson made Manafort the first Trump campaign official to be jailed as part of special counsel Robert Mueller’s investigation. Already under intense pressure to cooperate with prosecutors in hopes of securing leniency, Manafort now loses the relative freedom he enjoyed while he prepared for two criminal trials in which he faces the possibility of spending the rest of his life in prison. In issuing her ruling, Jackson said she had “struggled” with the decision but she couldn’t “turn a blind eye” to his conduct. “You have abused the trust placed in you six months ago,” she said. A federal grand jury indicted Manafort and a longtime associate, Konstantin Kilimnik, last week on charges of obstruction of justice and conspiracy to obstruct justice, adding to the multiple felony counts he already faced.