Democrat Doug Jones’ upset victory over Republican Roy Moore in Tuesday’s special Senate election in Alabama was a “referendum” on congressional Republicans’ leadership and proves they must delay tax reform, Sen. Chuck Schumer said Wednesday.

“The lesson of this election is that the Republican policies are all wrong,” he said during a DC press conference, demanding that Senate Majority Leader Mitch McConnell hold off a final vote on the Republican tax bill until Jones is seated.

“Our hope is that Mitch McConnell will do the right thing. That Mitch McConnell will hear what the voters in Alabama said: ‘Help us,’” he said.

When Jones takes his seat, the Republicans will have a 51-49 majority, meaning President Trump and congressional Republicans will have greater difficulty enacting their agenda.

It is not clear when Jones will be sworn in — it takes between 10 and 12 days to certify the election, and Jones may not actually take the seat until after the new year, Schumer said.

“I’d like to see him seated as soon as possible,” the New York Democrat added.