Congress may be headed for a partisan showdown on a massive coronavirus relief package government officials say is urgently needed to rescue the stalled economy.

Senate Majority Leader Mitch McConnell told reporters Sunday the $2 trillion product of bipartisan discussions have been drafted into a bill the Senate will vote on at 3 p.m. EST.

But House Speaker Nancy Pelosi and Senate Minority Leader Chuck Schumer said Democrats want changes and are not agreeing to the legislation. Pelosi told reporters the House would instead vote on a bill authored by Democrats, “and hopefully it'll be compatible with what they discussed on the Senate.”

The Senate will need 60 votes to begin debating the bill. Republicans control 53 votes, and if all vote in favor, they’ll need seven Democrats to advance the legislation Sunday.

Trump administration officials have urged Congress to begin advancing a package Sunday to send a positive signal to the financial markets before they open on Monday.

McConnell said he believes the Senate will advance Sunday’s measure because it is the shell bill and still can be altered to reflect changes sought by Democrats. The Kentucky Republican expressed optimism changes can be made in time to get Democrats on board to pass the legislation on Monday.

"We are still talking to them," McConnell said.

Democrats are seeking several changes to the legislation, an aide told the Washington Examiner.

According to the aide, the bill does not have enough worker protections that would keep them from getting fired during the economic slowdown caused by the coronavirus outbreak.

The bill includes hundreds of billions of dollars in grants and loans for businesses intended to keep them from closing and laying off workers.

Democrats want to offer small businesses loan forgiveness if 90% or more employees are retained.

Democrats also seek additional “restraints” on how the Treasury Department can use liquidity to help industries hurt by the economic slowdown. On Fox News Sunday, Treasury Secretary Steven Mnuchin said the federal government would be able to "lever up to" $4 trillion to help businesses for up to 120 days.

Democrats say the decision to help businesses is up to Mnuchin, who, they argue, could “give money to Trump properties.”

Democrats want more money for hospitals and medical facilities. They reject the current $110 billion included in the bill, pointing out the money to aid big businesses has grown from about $200 billion to $500 billion.

Democrats want stronger restrictions to prevent big industries such as the airlines from engaging in stock buybacks and want to extend the bill’s two-year limit on boosting executive pay.

Finally, Democrats, siding with labor unions, want forgivable loans, or grants, provided to the airlines, which would prevent “tens of thousands of layoffs” in the industry.