Senate Minority Leader Chuck Schumer said Monday that Democrats will push President Trump’s deputy attorney general nominee to commit to appointing a special prosecutor to investigate any connection between Trump and the Russians.

Federal prosecutor Rod Rosenstein will face bipartisan questioning Tuesday at his confirmation hearing before the Senate Judiciary Committee. Schumer, D-N.Y., said whether Rosenstein agrees to appoint a special prosecutor to probe an alleged Trump-Russia link is “the most important question he needs to answer.”