Special counsel Robert Mueller notified President Trump's lawyers last month that the president is being investigated as part of the Russia probe, but a source familiar with the situation says they were told Trump was not a criminal target at that time.The source declined to be identified because of the sensitivity of the matter but did confirm the details first reported by the The Washington Post.There have been ongoing discussions between Trump's lawyers and Mueller's team about the president sitting for an interview as part of the investigation. Trump has said he wants to speak with Mueller. Asked on March 22 whether he still wanted to testify before special counsel Robert Mueller, Trump said: "Yes. I would like to."John Dowd, the lawyer who had been leading Trump's legal team until he resigned late last month, reportedly was at odds with the president and others on the legal team about whether it was a good idea for Trump to sit for an interview with Mueller. Dowd was against it.Asked about the Post story, Trump lawyer Jay Sekulow said: "We do not discuss real or alleged conversations between our legal team and the Office of Special Counsel." Ty Cobb, the lawyer in the White House handling the Mueller probe, declined to comment.The Washington Post story also says Mueller told Trump's lawyers that he is preparing a report about the president's actions while in office and potential obstruction of justice and that he needed to interview Trump to complete that phase of his investigation. NPR has not confirmed this part of the story. The Washington Post report adds: