President Trump's leadership on the world stage is being put to the test everywhere,

and the challenge for America's allies and adversaries alike is this, figuring out his actual policies.

As the president prepares for the first major foreign trip of his second term,

we assess America's erratic and contradictory role in conflict zones across the globe. Next.

Good evening and welcome to Washington Week. Let me try to encapsulate the challenge

before us tonight. Here in Washington, no one knows for sure what President Trump wants to do

about the Iranian nuclear program. No one in Jerusalem knows that the president has truly just left Israel to fight the Houthis

of Yemen alone.

In Ottawa, no one really understands why Trump keeps threatening Canada's sovereignty.

In Copenhagen, leaders are asking themselves if Trump would actually invade Greenland.

And at the Vatican, one likely subject, how will the new

American Pope get along with an American president not known for sharing the stage or the Pope's

views on poverty and immigration? I'll try to unpack these mysteries tonight with my guests.

Susan Glasser, a staff writer at The New Yorker. Asma Khalid is an NPR White House correspondent

and co-hosts the NPR Politics Podcast. David Sanger is a White House and national security

correspondent at the New York Times, and Nancy Yusuf is a national security correspondent at the

Wall Street Journal. Okay, we have to go fast because there's a lot of countries to talk about.

The first, let's talk about the biggest news of the week.

And I recognize that the election of a new pope

is a matter of supreme ecclesiastical import,

but this is Washington Week,

so we're just going to do the politics of it.

...