Sam Patten, a Washington lobbyist and a former Paul Manafort associate, pleaded guilty Friday to a charge that he failed to register as a foreign agent for work he did for a Ukrainian political party.

Patten, 47, appeared in the U.S. District Court for the District of Columbia on Friday morning with his lawyer. U.S. District Judge Amy Berman Jackson in Washington, D.C., who is overseeing the case, accepted his guilty plea and allowed his release with a number of conditions.