Democratic leaders are hoping for House votes as soon as Tuesday on the two pillars of Joe Biden’s domestic spending agenda, two Democrats said Saturday, as the party mounted its latest push to get the long-delayed legislation through Congress.

Top Democrats would like a final House-Senate compromise on Biden’s now $1.75tn, 10-year social and environment plan to be written by Sunday, the Democrats said.

Talks among White House, House and Senate officials were being held over the weekend, said the Democrats, who described the plans on condition of anonymity.

An accord could clear the way for House passage of that bill and a separate $1tn measure funding road, rail and other infrastructure projects, the Democrats said.

It remains unclear whether the ambitious timetable can be met. To clear the Senate, any agreement will need the backing of centrist Democrats Joe Manchin, of West Virginia, and Kyrsten Sinema, of Arizona.

The two senators have forced Biden to retreat from his plan for a $3.5tn social and environment bill and to remove some initiatives from the measure.

Republican opposition to the social and environmental bill is unanimous. Democrats hold the House and Senate but in the latter are 10 votes short of the necessary super-majority to pass legislation.

They must therefore use reconciliation, a process for budgetary measures which allows for a simple majority. As the Senate is split 50-50 and controlled via the casting vote of Vice-President Kamala Harris, Manchin and Sinema have a tremendous amount of power.

The Senate approved the infrastructure bill in August on a bipartisan vote. House progressives have since sidetracked that bill, in an effort to pressure moderates to back the larger social and environment bill.