No one knows right now who's charged and what they're accused of because the indictment was sealed. Sources told CNN that anyone charged could be taken into custody as early as Monday.
Renato Mariotti says the most obvious potential targets are former national security advisor Michael Flynn and President Trump's former campaign manager, Paul Manafort, whose Virginia home was raided by the Federal Bureau of Investigation in July.
A spokesman for the special counsel's office declined to comment. Attorney General Jeff Sessions had to recuse himself because of his own undisclosed Russian contacts during the campaign.
Boy, 10, takes family vehicle , leads police on a high-speed chase
The incident started about 8:30 a.m. when the boy was waiting for his sister to take him to school, Cleveland police said. Dashcam footage from Ohio State Highway Patrol shows cop cars pin the boy in before forcing him out of the vehicle .
Sources familiar with Mueller's investigation said he has used that broad authority to investigate links between Trump aides and foreign governments as well as possible money laundering, tax evasion and other financial crimes.
The Kremlin has denied the allegations.
Subpoenas have already been issued to former Trump campaign chairman Paul Manafort, former national security adviser Michael Flynn, and others, including those involved in a Trump Tower meeting between Russians and campaign officials.
The Justice Department tapped Mueller, a former director of the Federal Bureau of Investigation, to head the probe in May. Flynn was forced to resign in February, 24 days into his appointment, after it was revealed that he lied to Vice President Mike Pence about conversations he had with Russia's ambassador to the U.S., Sergey Kislyak.
But that did not stop social media from hypothesizing on who charges could be coming against. NBC News later confirmed reports of a Monday indictment. Rosenstein oversees the Mueller probe at the Justice Department.