(Corrects 3rd paragraph to show that funding for government agencies is at an annual rate of just over $1 trillion, not funding of just over $1 trillion. Corrects 4th paragraph to show that the funding for military operations overseas is an annual rate of $74 billion, not funding of $74 billion)
By David Morgan
WASHINGTON, Sept 22 (Reuters) - A behind-the-scenes congressional battle to avoid a U.S. government shutdown broke into public view on Thursday when Republicans produced a stop-gap funding bill that Democrats immediately rejected.
The federal fiscal year ends on Sept. 30 and Congress must pass a spending measure by then to keep the government open. In recent years, lawmakers have seldom been able to agree on a full federal budget and instead have relied on stop-gap measures.
Senate Republican Leader Mitch McConnell capped weeks of labored negotiations by proposing a continuing resolution that would fund government agencies from Oct. 1 through Dec. 9 at an annual rate of just over $1 trillion.
The measure also includes $1.1 billion to combat the spreading Zika virus, $500 million in flood relief for states including Louisiana and funding for U.S. military operations overseas at an annual rate of $74 billion.
"There have been broad requests for a clean continuing resolution. So that's what I've just offered," said McConnell, who described the measure as a product of bipartisan negotiations.
But Democrats quickly opposed the resolution as "a Republican-only bill" that would not help Flint, Michigan, cope with lead-contaminated water and leave in place a prohibition against the U.S. Securities and Exchange Commission requiring public companies to disclose political spending.
"We Democrats cannot vote for that," said Senator Barbara Mikulski, top Democrat on the Senate Appropriations Committee.
McConnell left out a provision backed by Republican presidential nominee Donald Trump and his former White House rival, Senator Ted Cruz, that would have stopped the U.S. government from moving oversight of the Internet's technical management to a global community of stakeholders on Oct. 1.
Also absent was language that would have enabled the U.S. Export-Import Bank to approve loans or guarantees of more than $10 million. Republicans and Democrats had sought to include a provision, but the issue proved too controversial for the must-pass funding resolution.
A senior Republican aide said the Senate would begin voting on the funding legislation as early as Monday. (Reporting by David Morgan and Richard Cowan; Editing by Kevin Drawbaugh and Cynthia Osterman)