Two prominent senators who have investigated Hunter Biden's various international business schemes for months already now are demanding that the Department of Justice investigate whether he financed a "prostitution or human trafficking ring" that is tied to Russia.

"What is the Justice Department trying to hide from Congress and the American people?" asked Sens. Ron Johnson of Wisconsin and Charles Grassley of Iowa in their new letter to the DOJ.

"These findings of potentially criminal behavior must be thoroughly investigated by law enforcement entities according to the highest ethical standards. Yet, due to your agencies' continued failure to provide Congress with answers to its legitimate oversight questions, we have serious concerns about your review of this matter as well as the ongoing Hunter Biden criminal case."

The letter was sent to Attorney General Merrick Garland, FBI chief Chris Wray and U.S. Attorney for Delaware David Weiss.

It's already known that Hunter Biden is under federal investigation, likely for taxes but possibly for other issues like improperly representing a foreign government, reports have confirmed.

Now, Just the News explains more suspicions have come up because of Washington Examiner reports that "Joe Biden may have unwittingly financed Hunter Biden's 'participation in an escort ring tied to Russia.'"