Don Gonyea

One of the most fragile pieces of President Obama's legacy in the aftermath of the 2016 election is the Affordable Care Act.

Republicans ran on their long-standing pledge to repeal it, and we'll know soon whether — as promised — they make it their top priority in the new Congress, even without having released details on what would replace it.

The history of the Affordable Care Act also provides a window into the earliest years of the Obama presidency.

Updated at 9:10 a.m. ET

For more than 50 years, it's been a tradition at the White House — a concise daily intelligence briefing, presented to the president and a small group of top officials.

It is also tradition for the winner of the presidential election to start receiving the same briefing during his transition, as a way to start preparing for the world he will face once he moves into the Oval Office.

But Donald Trump, who defied all conventions of campaigning for the White House, is doing the same when it comes to the President's Daily Brief.

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AUDIE CORNISH, HOST:

In what may be the most unlikely meeting of the presidential transition process so far, former vice president, former Democratic presidential nominee, former senator and Nobel Peace Prize winner Al Gore met with President-elect Donald Trump on Monday.

Gore has spent decades warning about the dire consequences of unchecked, man-made climate change, while Trump has regularly called climate change "a hoax" during the campaign.

Updated at 3:18 p.m. ET with McConnell reaction

With an early morning tweet, President-elect Donald Trump revived an issue that hasn't been front and center in American politics for more than a quarter-century.

Flag burning.

Here's what Trump posted at 6:55 a.m. ET:

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