WASHINGTON - Senate Majority Leader Charles Schumer, D-N.Y., pledged Friday that Congress would approve President Biden's $1.9 trillion coronavirus relief bill and send it to the president to sign ahead of a March 14 deadline when enhanced unemployment insurance benefits expire. 

He made the promise even as a dispute over Biden's proposed $15 minimum wage increase remains unresolved, with moderate Democratic senators balking on the issue as liberals push it aggressively. Under complex Senate rules for consideration of the legislation, lawmakers are awaiting guidance from the Senate parliamentarian on whether the minimum wage provision can even be part of the package.

"The Senate is on track to send a robust $1.9 trillion package to the president's desk before the March 14 expiration of Unemployment Insurance benefits. We will meet this deadline," Schumer wrote in a Friday letter to Senate Democrats.

The House is prepared to take up the bill next week and pass it and send it to the Senate late in the week, perhaps Friday or Saturday. That would allow the Senate a couple weeks to work through the minimum wage dispute and any other issues - and send the legislation back to the House for final passage if changes are made - ahead of the March 14 deadline.

March 14 is when current $300 weekly emergency federal unemployment benefits are set to expire. The Biden bill would increase those weekly benefits to $400 and extend them into the fall.

The legislation also includes a new round of $1,400 stimulus checks. Coming on top of $600 stimulus payments approved in December, that would make good on Biden's promises of $2,000 stimulus checks to voters.

Additionally the legislation includes some $350 billion for city and states governments experiencing massive revenue shortfalls; $160 billion for vaccines, increased testing and other help for the health care system; around $130 billion to help schools reopen; food assistance and rent help; and an increased and expanded child tax credit.

House Minority Whip Steve Scalise, R-La., sent a "whip notice" to House Republicans on Friday urging a "no" vote on the legislation and labeling it the "Pelosi's Payoff to Progressives Act" - a reference to House Speaker Nancy Pelosi, D-Calif.

"Next week, the House is expected to consider the nearly $2 trillion package of progressive priorities Democrats have rushed to bring to the Floor," the Scalise whip notice said. "This package will keep schools closed, bailout blue states, pay people not to work, and raise the minimum wage to $15/hour."

Aides to Senate Minority Leader Mitch McConnell, R-Ky., also circulated a memo Friday indicating they planned to challenge the legislation aggressively once it reaches the Senate floor under the rules of "budget reconciliation," which would allow it to pass with a simple majority vote instead of the 60 votes normally required.

Under budget reconciliation, provisions without a budgetary impact are prohibited. The McConnell memo highlighted the minimum wage increase, among other issues. The nonpartisan Congressional Budget Office has said increasing the $7.25 hourly federal minimum wage to $15 would increase earnings for millions of workers and lift people out of poverty but also eliminate 1.4 million jobs - findings Democrats have challenged.

Because the Senate is divided 50-50 between Democrats and Republicans, Democrats can't afford to lose a single vote if they proceed without GOP support under "budget reconciliation." If they hold together, they can pass the legislation with Vice President Kamala Harris breaking the tie.

But two moderate Senate Democrats - Joe Manchin of West Virginia and Kyrsten Sinema of Arizona - have indicated opposition to increasing the minimum wage to $15 an hour via the reconciliation process. Manchin indicated earlier in the week that he could be open to a lower figure number, according to activists who met with him, while Sinema has separately promoted other priorities for the bill, specifically additional funding to help small restaurants.

Members of the Congressional Progressive Caucus in the House have identified the $15 minimum wage as their top priority for the bill, and along with Senate Budget Chairman Bernie Sanders, I-Vt., have been lobbying aggressively for its inclusion. Biden himself has said repeatedly that he supports a $15 minimum wage, while raising questions about whether it would survive the parliamentary process. At a town hall earlier this week, he also expressed sympathy for a small-business owner who raised concerns about the issue, and said the question of its impact was "debatable."

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The Washington Post's Jeff Stein contributed to this report