U.S. investigators examining money laundering accusations against President Donald Trump’s former campaign manager Paul Manafort hope to push him to cooperate with their probe into possible collusion between Trump’s campaign and Russia, two sources with direct knowledge of the investigation said.

Special Counsel Robert Mueller’s team is examining Manafort’s financial and real estate records in New York as well as his involvement in Ukrainian politics, the officials said…

The sources also did not say whether Mueller has uncovered any evidence to charge Manafort with money laundering, but they said doing so is seen by investigators as critical in getting his full cooperation in their investigation.