Tom Gjelten

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Religion has played an outsized role in U.S. history and politics, but it's one that has often gone unrecognized in U.S. museums.

"As a focused subject area, it's been neglected," says Peter Manseau, a scholar and writer installed last year as the first full-time religion curator at the Smithsonian Institution's National Museum of American History.

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Immigration authorities have rounded up nearly 200 Iraqis in recent weeks, and the Trump administration is now under heavy pressure to hold off moves to deport them.

Many of those currently detained are from the minority Chaldean Christian community, which faces severe persecution in Iraq.

U.S. immigration authorities say the detained Iraqis have criminal records, but their families and supporters say many have already served time or paid their fines and that they would face persecution if sent back.

Saturday's nationwide "March Against Sharia," sponsored by a group known for aggressively criticizing Islam, has in recent days become a rallying cause for right-wing extremists, forcing march organizers to repudiate some of their own supporters and prompting concern about clashes with militant leftists.

By heading straight to the homelands of Islam, Judaism and Christianity on his first presidential trip, Donald Trump took a major risk. The possibility of offending his hosts somewhere along the way with an ill-considered tweet or offhand remark loomed large. Saudi Arabia, Israel and the Vatican are places where appearances matter and words must be chosen carefully.

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MICHEL MARTIN, HOST:

Now to the Vatican for our feature Words You'll Hear. That's where we try to understand some of the stories we'll be hearing more about in the coming days by parsing a word or phrase connected with the story.

President Trump's choice to represent the United States at the Vatican, Callista Gingrich, has one especially prominent achievement as a Catholic: She is responsible for her husband, former House speaker Newt Gingrich, converting to Roman Catholicism in 2009.

"When Newt became a Catholic, it was one of the happiest moments of my life," she said in a 2012 interview with The New Yorker.

Donald Trump's first overseas trip as president begins Friday with a pilgrimage of sorts. With stops in Saudi Arabia, Israel and the Vatican, Trump will be visiting the centers of Islam, Judaism and Christianity, the three major monotheistic religions.

But he's wading into deep waters with potential for missteps and disagreement. He'll meet with Muslim leaders despite declaring that "Islam hates us" during the campaign; he'll meet with Pope Francis, who advocates for countries to be welcoming to refugees.

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