In a move that makes a government shutdown more likely, House Republicans approved a spending plan Sunday morning that would delay Obamacare for a year and repeal its tax on medical devices.
The temporary budget resolution now goes back to the Senate, where Democrats have consistently said any changes to President Barack Obama's signature healthcare law is a deal-killer.
On top of that, Obama has already issued a veto threat.
If Washington can't reach a deal, a government shutdown will begin at 12:01 a.m. Tuesday.
[Updated at 12:58 p.m. ET] In rare bipartisan accord, normally quarrelsome U.S. lawmakers passed a measure designed to end budget-related air traffic controller furloughs blamed for widespread flight delays.
The House of Representatives approved the legislation, capping a major congressional initiative as delays snarled traffic at airports. The House vote comes a day after unanimous approval by the U.S. Senate.
The measure - which is expected to be signed into law by President Obama - gives the Transportation Department budget planners new flexibility for dealing with forced spending cuts.
The border with Mexico must be secure.
This requirement is the cornerstone of an immigration reform bill a bipartisan group of senators are to file on Capitol Hill Tuesday. There will be no path to legal residency for migrants without it.
Undocumented immigrants may also not reach the status of fully legal residents under the proposed legislation, until the Department of Homeland Security has implemented measures to prevent "unauthorized workers from obtaining employment in the United States."
$85 billion in automatic across-the-board spending cuts became law last week, as President Obama and Congress struggle to find a solution to the crisis. Watch CNN.com Live for continuing coverage on this story.
Today's programming highlights...
10:00 am ET - North Korea policy hearing - As North Korea makes new threats amid possible U.N. sanctions over its nuclear ambitions, the Senate Foreign Relations Committee meets to discuss existing U.S. policy toward Pyongyang.
$85 billion in automatic across-the-board cuts became law last week, as President Obama and Congress struggle to find a solution to the crisis. Watch CNN.com Live for continuing coverage on this story.
9:30 am ET - Justice Department oversight hearing - Attorney General Eric Holder may discuss spending cuts and drones when he testifies at an oversight hearing before the Senate Judiciary Committee.
8:30 am ET - Menendez speaks at AIPAC - Embattled Sen. Robert Menendez returns to the public eye this morning as he addresses the American Israel Public Affairs Committee's policy conference in Washington.
10:15 am ET - Obama reveals OMB nomination - President Obama is expected to nominate the head of the Walmart Foundation to be the next director of the Office of Management and Budget.
$85 billion in automatic spending cuts begin today as President Obama and Congress struggle to find a solution to the crisis. Watch CNN.com Live for continuing coverage on this story.
The Jodi Arias trial resumes on Monday.
10:10 am ET - SpaceX launches cargo mission - SpaceX will attempt to launch its second official cargo supply mission to the International Space Station.
$85 billion in automatic across-the-board spending cuts will happen unless President Obama and Congress reach a deal by tomorrow. Watch CNN.com Live for continuing coverage on this story.
10:00 am ET - State of the U.S. economy hearing - The threat of forced budget cuts will likely be discussed when the Joint Economic Committee meets to discuss the health of the U.S. economy.
$85 billion in automatic across-the-board spending cuts will take place if President Obama and Congress can't reach a deal by March 1. Watch CNN.com Live for continuing coverage on this story.
10:00 am ET - Assault weapons ban legislation briefing - The Senate Judiciary Committee holds a hearing on proposed legislation that, if signed into law, would ban the sale and manufacturing of dozens of firearms.
$85 billion in automatic across-the-board cuts will happen unless President Obama and Congress come to an agreement by March 1. Watch CNN.com Live for continuing coverage on this story.
10:00 am ET - Ben Bernanke on Capitol Hill - Federal Reserve Chairman Ben Bernanke is slated to discuss the economy and U.S. monetary policy before a Senate committee today, but he may also discuss the threat of forced spending cuts.
$85 billion in automatic across-the-board spending cuts could happen if President Obama and Congress don't reach a deal by March 1. Watch CNN.com Live for continuing coverage on this story.
The Jodi Arias murder trial is in recess until Monday.
11:20 am ET - White House briefing - Spending cuts, immigration and gun control will likely dominate Press Secretary Jay Carney's briefing with the White House press corps.
Billions of dollars in automatic across-the-board spending cuts could take place on March 1 unless President Obama and Congress do something about it. Watch CNN.com Live for continuing coverage on this story.
11:00 am ET - Kerry speaks at university - Secretary of State John Kerry makes his first major public address since taking over the post. The remarks will be made on the campus of the University of Virginia in Charlottesville.
President Obama and Congress look to avert $85 billion in automatic across-the-board spending cuts scheduled for March 1. Watch CNN.com Live for continuing coverage of the sequestration crisis.
10:45 am ET - Obama's sequestration warning - President Obama will ask Congress to work with him to avoid the March 1 spending cuts in remarks from Washington.
10:00 am ET - U.S. drone aircraft hearing - A House science subcommittee holds a hearing on the use of unmanned aircraft over U.S. airspace.
10:00 am ET - Sequestration threat hearing - Three Cabinet secretaries and others will testify before a Senate committee on how the threatened spending cuts would affect their departments.
10:00 am ET - Postal Service crisis hearing - The U.S. Postal Service is ending most Saturday delivery amid concerns that its time is running short. Can the USPS be saved? The House Government Affairs Committee looks into the matter.
President Obama will deliver his fourth State of the Union address before Congress tonight. Watch CNN.com Live for all of your political coverage.
Ongoing coverage: North Korea's nuclear test
9:30 am ET - Military sequestration hearing - What would threatened across-the-board budget cuts mean for the U.S. military and national defense? Top Pentagon and military officials discuss the matter before the Senate Armed Services Committee.
President Obama will deliver his fourth State of the Union address before Congress on February 12. Watch CNN.com Live for all of your political coverage.
Ongoing coverage: The resignation of Pope Benedict XVI
12:30 pm ET - White House briefing - Tomorrow's State of the Union address and gun violence will likely dominate Press Secretary Jay Carney's briefing with the White House press corps.
Ongoing coverage - U.S. winter storm preparation and briefings
12:00 pm ET - Murder suspect manhunt briefing - The search continues for ex-Los Angeles police officer Christopher Dorner, who is accused of killing three people. Police update the investigation.
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