WASHINGTON — Democrats on Monday began trying to push $60.4 billion in emergency spending for superstorm Sandy victims through Congress by Christmas. Republicans responded: Not so fast.

The Senate opened debate on the aid measure seven weeks after the storm swept up the East Coast, causing extensive damage in New York, New Jersey and Connecticut and killing more than 120 people.

Several Republicans say they're sympathetic to Sandy victims, but they favor a smaller aid package for the moment and suggest cutting other federal programs to pay for parts of it. They say some measures in the bill — including money for salmon fisheries in Alaska, new government cars and an Amtrak expansion project — smack more of congressional pork than disaster aid.

GOP Sens. John McCain of Arizona and Tom Coburn of Oklahoma released a list of what they called "questionable" spending in the bill, including $5.3 billion for the Army Corps of Engineers with no statement of priorities about how to spend the money, $125 million for the Department of Agriculture's emergency program for restoring watersheds damaged by wildfires and drought, and $50 million in subsidies for tree planting on private properties.

"Americans impacted by Hurricane Sandy deserve better than this," they said in a joint statement.

The Club for Growth, an influential conservative group, urged senators to oppose the bill, saying it was overpriced, laden with pork and not paid for.

The bill faces a tough fight with time running short in a lame-duck session of Congress dominated by a standoff in negotiations between the White House and Republican lawmakers over how to avoid the "fiscal cliff." The combination of automatic spending cuts and tax increases will kick in next month unless lawmakers and the president act to stop them. The aid bill ultimately could be wrapped into a broader package as part of the fiscal cliff talks.

Sen. Chuck Schumer, D-N.Y., the Senate's No. 3 Democrat, has said he's confident the bill has strong support from Democrats, who have a 53-47 majority, but supporters likely will need several GOP votes for the measure to clear procedural hurdles with the needed 60 votes. Democrats hope to win over New England Republicans and GOP senators from hurricane-prone Southern states.

House GOP leaders have not said how they plan to proceed.

House Appropriations Committee Chairman Hal Rogers of Kentucky has said Congress may want to begin with a smaller aid package for immediate recovery needs and wait until more data can be collected about storm damage before approving additional money next year.

The bill includes $188 million for an Amtrak project to curb rail bottlenecks in the Northeast. The project was on the table long before Sandy hit in late October, according to an analysis of the bill by the group Taxpayers for Common Sense.