Special Counsel ​Robert S. Mueller III slapped President Donald Trump’s former campaign chairman Paul Manafort with new obstruction charges Friday and indicted Konstantin V. Kilimnik, Manafort’s longtime aide.

Manafort is suspected of coordinating the lobbying activities of The Hapsburg Group, a European interest network with ties to Ukrainian and Russian ​politicsin the United States during the 2016 elections, in violation of laws prohibiting foreign interference.

The prosecutors hope to show that Kilimnik and Manafort had directed witnesses to testify that the group's activities were restricted to Europe. In so doing, the two may be liable for obstruction of ​justice and conspiracy to obstruct, ​according​ to the joint charges filed Friday.

Manafort has already been charged with money laundering and foreign lobbying ​in October, 2017.