( CNN) Two Senate Democrats are calling for Attorney General Jeff Sessions to recuse himself from any Justice Department investigation into issues related to the abdication of national security adviser Michael Flynn and his contacts with the Russian ambassador late last year.

Senate Minority Leader Chuck Schumer called Tuesday for an “independent investigation, ” perhaps led by career DOJ employees with prosecutorial powers, while Oregon Sen. Jeff Merkley suggested to CNN’s Erin Burnett a special prosecutor should be appointed.

“( Flynn’s) resignation raises more questions than it answers and the American people deserve the truth, ” Schumer said at a news conference in the Capitol.