Federal prosecutors in New York are weighing criminal charges against former Obama White House counsel Greg Craig as part of an investigation into whether he failed to register as a foreign agent in a probe that is linked to former Trump campaign chairman Paul Manafort, according to sources familiar with the matter.

In addition, these sources said, prosecutors in the US Attorney’s Office for the Southern District of New York are considering taking action against powerhouse law firm Skadden, Arps, Slate, Meagher & Flom LLP, where Craig was a partner during the activity under examination. Prosecutors are considering a civil settlement with the firm or a deferred prosecution agreement with Skadden, these sources said.