U.S. President Barack Obama has invited congressional leaders for talks as the United States moves closer to a default that could damage the world economy.

Democrat and Republican leaders from both houses are to meet Monday with the president and Vice President Joe Biden at the White House, during the 14th day of a partial federal government shutdown.

Lawmakers are trying to resolve a fight over government spending before the Thursday deadline for extending the country's borrowing authority. Failure could result in the United States exhausting its ability to pay its bills.

Republicans want a small hike in the debt ceiling and more spending cuts, while Democrats want higher rise in the ceiling and a short-term spending bill to reopen the government.

After weekend talks, Democratic Senate Majority Leader Harry Reid and Republican leader Mitch McConnell say prospects are good for resolving the issues before Thursday.

International Monetary Fund managing director Christine Lagarde told NBC-TV's Meet the Press Sunday that failing to increase the debt ceiling would mean "massive disruption the world over" and could increase the risk of another global recession.

"You have to honor your signature, you have to give certainty to the rest of the world and you have to make sure that your own economy is consolidating that welcome economy that we have seen in the last few days, because it impacts the entire economy."

Lawmakers are holding their meetings on the federal holiday known as Columbus Day, which marks the anniversary of the arrival of explorer Christopher Columbus to the Americas. In the past 20 years, both the House and Senate have only been in session on that date once, in 1998, while the Senate met one other time in 2004.