The U.S. Senate is back in session, and therefore so is the Democratic nominations blockade. Minority Leader Chuck Schumer demanded Wednesday that President Trump withdraw his nomination of Bill Barr as Attorney General, even though Mr. Barr served with distinction as President George H.W. Bush’s AG. The question is whether Senate Republicans are going to do anything more to overcome this deliberate political obstruction than they did in the last two years.

The Senate confirmed 77 stalled nominees—a collection of ambassadors, U.S. attorneys or other non-controversial picks—by voice vote on Jan. 2. But thanks mostly to Democratic objections, the upper chamber returned to the White House 384 nominees it failed to confirm in the 115th Congress. That includes some 70 judicial nominees.

The White House will now have to renominate these men and women, assuming they haven’t given up in frustration. Mark Greenblatt was nominated to be inspector general of the Ex-Im Bank in September 2017, 16 months ago. The Banking Committee approved him three months later; he’s still waiting for a floor vote. Burlington Stores exec Janet Dhillon, the nominee to lead the Equal Employment Opportunity Commission, has been waiting 18 months.

The Partnership for Public Service reports that 543 of President Trump’s 934 nominations had been confirmed by Dec. 19, 2018. At the same point in Barack Obama’s presidency, 809 of his 1,003 picks had Senate approval.

The White House was rightly criticized for its slow start with executive-branch nominations, but the main problem long ago became the systematic Democratic effort to prevent President Trump from filling out the government. First, Democrats take as much time as possible tying up nominees in committee. Once even non-controversial nominees get to the floor, Democrats then object to a quick voice-vote confirmation and demand a cloture vote that requires 30 hours of floor debate.