The Washington Post has reported that persons close to the White House have confirmed that Special Counsel Robert S. Mueller is now investigating President Trump for possible obstruction of justice in the FBI investigation of Russia’s role in the 2016 elections.
This marks a turning point in the investigation previously headed up by former FBI Director James Comey, who was fired by Trump under circumstances that raised the appearance of impropriety. There have been rumors that over the past few days Trump had considered firing Mueller as well. Doing so now, however, would probably invite the filing of articles of impeachment.
The Washington Post article can be read in full here