WASHINGTON (AP) ― Republicans in Congress put forth a “fiscal cliff” counteroffer to President Barack Obama on Monday, calling for cuts to popular social programs and no tax hikes for the wealthy ― an offer that was swiftly panned by the White House, which declared the Republicans still weren’t ready to “get serious’’ as a massive package of automatic tax increases and spending cuts looms.

With the clock ticking toward a Dec. 31 deadline, the impasse means the White House and a divided Congress are nowhere near a compromise. The White House, emboldened by Obama’s re-election last month, again vowed that letting Bush-era tax cuts for the rich expire will be in any measure the president signs and insisted that if Republicans won’t give in, Obama is willing to take the U.S. over the so-called cliff.

If no deal is reached, many economists say the one-two punch of tax increases and spending cuts could send the fragile U.S. economy back into recession.

The Republican proposal, sent to the White House by House of Representatives Speaker John Boehner, calls for raising the eligibility age for Medicare ― the government health care program for the elderly ― and lowering cost-of-living hikes for Social Security, the federal pension program.

Obama’s plan, offered last week, would raise taxes by $1.6 trillion over the coming decade but largely exempt Medicare and Social Security from budget cuts.

Boehner and other Republicans said they were proposing a “reasonable solution” for negotiations that Boehner says have been going nowhere. The House speaker said he hoped the administration would “respond in a timely and responsible way.”

Though the Republican plan proposes to raise $800 billion in higher tax revenue over the same 10 years, it would keep the tax cuts implemented during the George W. Bush presidency ― including those for wealthier earners targeted by Obama ― in place for now. Dismissing the idea of raising any tax rates, the Republicans said the new revenue would come from closing loopholes and deductions while lowering rates.

The White House complained the latest offer was still short on details about what loopholes would be closed or deductions eliminated, and it insisted that any compromise include higher tax rates for upper-income earners.

Asked directly whether the country would go over the cliff unless Republican lawmakers backed down, administration officials said yes., though they said they remained hopeful that scenario could be avoided, saying the president continues to believe that going over the cliff would be damaging to the economy. And they signaled that Obama wouldn’t insist on bringing the top tax rate all the way back to the 39.6 percent rates of the Clinton era. The officials spoke on condition of anonymity because they were not authorized to speak publicly about internal White House deliberations.

“Until the Republicans in Congress are willing to get serious about asking the wealthiest to pay slightly higher tax rates, we won’t be able to achieve a significant, balanced approach to reduce our deficit our nation needs,” White House Communications Director Dan Pfeiffer said in a statement.

Boehner saw the situation as just the reverse.

“After the election I offered to speed this up by putting revenue on the table and unfortunately the White House responded with their la-la land offer that couldn’t pass the House, couldn’t pass the Senate and it was basically the president’s budget from last February,’’ he said Monday.

The Republican proposal itself revives a host of ideas from failed talks with Obama in the summer of 2011. Then, Obama was willing to discuss a so-called grand bargain, including politically risky ideas such as raising the eligibility age for Medicare, implementing a new inflation adjustment for Social Security cost-of-living adjustments and requiring wealthier Medicare recipients to pay more for their benefits.

Monday’s Republican plan contains few specifics and anticipates that many details will have to be filled in next year in legislation overhauling the tax code and curbing the growth of benefit programs.

By Republican math, their plan would produce $2.2 trillion in budget savings over the coming decade: $800 billion in higher taxes, $600 billion in savings from costly programs like Medicare, $300 billion from other proposals such as forcing federal workers to contribute more toward their pensions and $300 billion in additional savings from the Pentagon budget and domestic programs funded by Congress each year.

Under the administration’s math, Republican aides said, the plan represents $4.6 trillion in 10-year savings. That estimate accounts for earlier cuts enacted during last year’s showdown over lifting the government’s borrowing cap and also factors in war savings and lower interest payments on the $16.4 trillion national debt.

Last week, the White House delivered to Congress its opening proposal: $1.6 trillion in higher taxes over a decade, a possible extension of the temporary Social Security payroll tax cut and heightened presidential power to raise the national debt limit.

In exchange, the president would back $600 billion in spending cuts, including $350 billion from Medicare and other health programs. But he also wants $200 billion in new spending for jobless benefits, public works projects and aid for struggling homeowners. His proposal for raising the ceiling on government borrowing would make it virtually impossible for Congress to block him going forward.