WASHINGTON – Congressional leaders showed few signs of compromise in their ongoing budget battle Sunday, with Republican and Democratic leaders publicly accusing one another of not being serious about crafting a responsible federal spending plan quickly.

Senate Minority Leader Mitch McConnell, R-Ky., said President Obama and congressional Democrats do not appear willing to make the deep cuts necessary to control the country’s deficit spending.

McConnell, who has met privately with White House leaders and Vice President Joe Biden in recent days and spoke Sunday on CBS’s “Face the Nation,” said he is “not optimistic” about the two sides tackling major budget matters, including expensive entitlement programs.

Democrats accused the Republican-controlled House of proposing “reckless” cuts in a small sliver of the budget — slashing deeply into domestic discretionary programs for education and energy research, but leaving stand a much larger portion of the budget, including defense spending.

“I think it’s an ideological, extremist, reckless statement,” Sen. John Kerry, D-Mass., said of the House proposal earlier on “Face the Nation.”

“If that were to be in fact put in place, it would contribute to the reversal of our recovery. It might even destroy our recovery.”

Meanwhile, the clock is ticking, and the gap between the two sides is still wide.

Just a few days ago, lawmakers averted a government shutdown and bought more time for negotiation. As the government’s authority to spend taxpayer funds was about to expire Friday, Obama signed a measure last week to fund the government for two more weeks, until March 18.

So far, Republicans have proposed $61 billion in cuts from current spending levels while Democrats have proposed an estimated $10.5 billion in cuts.

Sen. Richard Durbin, D-Ill., suggested on a “Fox News Sunday” appearance that Democrats were unwilling to go any further than what they have offered. He said the Democratic proposal on discretionary spending cuts has been pushed “to the limit.”

Lawmakers appeared far less sanguine about a deal than the White House. On Saturday, Obama said he was willing to make further spending cuts, and White House chief of staff William Daley said Sunday he was “optimistic that there will not be a shutdown.”