Washington (CNN) Senate Minority Leader Chuck Schumer said Wednesday he does not know if the $2 trillion stimulus deal reached early Wednesday, the largest emergency aid deal in history, will be enough to offset the economic damage of coronavirus given the uncertainty surrounding the pandemic.

"We don't know how long it's going to last, who's affected. We still don't exactly know, " Schumer told CNN's John Berman on "New Day."

"We should be willing, able to come back in a bipartisan way and do more if we need. I believe we'll probably have to do that one way or another," the New York Democrat said.

After days of intense discussions, the White House and Senate leaders struck a historic deal to respond to the intensifying coronavirus pandemic, which is grinding much of the US economy to a halt. The package, which is expected to pass Congress, would be the most significant legislative action taken to address the crisis, which is overwhelming hospitals.

The full details of the bill were expected to be released later Wednesday morning. But over the last 24 hours, the elements of the proposal have come into sharper focus, with $250 billion set aside for direct payments to individuals and families, $350 billion in small business loans, $250 billion in unemployment insurance benefits and $500 billion in loans for distressed companies.

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