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This is MORNING EDITION from NPR News. Good morning, I'm David Greene.

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And I'm Renee Montagne.

It's the third and final day for the U.S. Supreme Court to consider the Obama health care overhaul. The justices hear arguments today on what parts could remain in effect if the court rules the individual mandate of the health care law is unconstitutional. After yesterday's arguments, that seemed more likely than most experts had expected.

NPR's legal affairs correspondent Nina Totenberg reports.

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Now, if the health care law survives constitutional scrutiny, the Republicans who are running for president have vowed to repeal the law if elected. One GOP candidate now appears less likely to have that opportunity. Newt Gingrich is short on victories and low on cash, and he is dramatically shrinking his campaign for president.

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And the controversial Keystone XL pipeline, whose construction has been delayed over environmental concerns, could now face some competition.

As NPR's John Ydstie reports, two companies have announced plans to build pipelines that would carry out the same service as the XL, channeling oil from Canada's tar sands to refineries in the Gulf of Mexico.

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And our last word in business today is lost and found.

For nearly 60 years, the whereabouts of a painting by Paul Cezanne remained a mystery. Some art experts feared his 19th century painting was lost forever. The watercolor is a study for a famous series of oil paintings Cezanne called "The Card Players."

The nation's capital is focused on the Supreme Court this week, and that includes members of Congress. Wednesday is the third day justices will hear arguments considering the constitutionality of President Obama's health care overhaul.

Comedian Bill Maher's $1 million check to the superPAC supporting President Obama's re-election is the first seven-figure donation to the group since Obama tacitly endorsed the fundraising strategy in early February.

And it has brought new focus to some of Maher's statements about women — specifically Republican women — and led to calls for the White House to disavow the HBO host and his money.

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NPR's business news starts with new owners for the L.A. Dodgers.

One of the more legendary athletes here in Los Angeles, basketball's Magic Johnson is leading a consortium of investors to buy the Major League baseball team.

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This is a $2 billion deal. And that shatters the record for the most money paid for a North American sports franchise. The NFL's Miami Dolphins went for $1.1 billion three years ago.

Backed by the federal government, doctors in Michigan are trying to expand the use of a controversial form of organ donation that raises disturbing ethical concerns, including questions about whether the donors are really dead. Defining dead turns out to be pretty complicated. There are two ways to declare someone dead.

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Pope Benedict stuck to mostly spiritual themes on a visit to communist Cuba's most sacred shrine. This morning, the pontiff leads a mass in Havana's Plaza of the Revolution. As Nick Miroff reports from Havana, so far even Benedict's gentle push for greater religious and political freedoms for Cubans has been rejected by the government.

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Florida state investigators are continuing to look into the shooting death of Trayvon Martin. His family has been part of a widespread campaign calling for the arrest of the neighborhood watch volunteer who shot and killed the 17-year-old high school student. Yesterday, the parents of Trayvon Martin were up on Capitol Hill attending a forum on hate crimes and racial profiling. NPR's Sonari Glinton reports from the Capitol.

Folklorist Alan Lomax spent his career documenting folk music traditions from around the world. Now thousands of the songs and interviews he recorded are available for free online, many for the first time. It's part of what Lomax envisioned for the collection — long before the age of the Internet.

After Tuesday's judicial fireworks, the Supreme Court wraps up arguments on the new health care law Wednesday by focusing on two questions. The first involves what would happen if the "individual mandate" — the core of the law that requires most people to have health insurance — is struck down. Would the rest of the law fall, too, or could some provisions stay?

This year's Final Four seems more like Best in Show at the Westminster. Such pedigree: Kentucky, Kansas, Ohio State and Louisville –– four of the very top dogs in the history of the sport. Well, it's a Meryl Streep kind of year, isn't it?

But if the Final Four might delight fans by giving them aristocracy in its teams, unfortunately the whole of college basketball is plagued by anonymity in its players, and external issues that have diminished the popularity of the game.

Good grief. This year, there has been more buzz about Mad Men than about March Madness.

In its second-to-last argument over the Affordable Care Act, the Supreme Court on Wednesday ponders a what-if.

Specifically, if the justices decide that Congress exceeded its constitutional authority in enacting the part of the law that requires most Americans to either have health insurance starting in 2014 or pay a penalty, does that invalidate the rest of the law? And if not, how much, if any, of the rest of the law should it strike down?

As we reported last week, an independent panel reviewing the Mine Safety and Health Administration's (MSHA) role in the 2010 Upper Big Branch mine disaster found that the agency "possibly could have prevented" the explosion that took 29 lives.

Pope Benedict XVI landed in Havana today and he's expected meet Cuban President Raúl Castro.

The pontiff's visit has put Cuba's dictatorship in the spotlight, because during his speeches the Pope has been taking subtle shots at the regime. The Los Angeles Times reports: