Out front next, an American Pope, a day in history.

Chicago-born Robert Pervas elected to lead the world's one and a half billion Roman Catholics,

a decision that stunned the world today.

I'll speak to a bishop who knows Pope Leo the 14th well.

Plus Maria Shriver, one of the nation's most renowned Catholics,

niece of America's first Catholic president, JFK, talks about her hopes for this new historic

Pope. And Trump claims tonight he's made his first trade deal. Wait till you hear what he said.

When it comes to the details, let's go out front. And good evening, welcome to this special edition of Outfront.

I'm Aaron Burnett, live from Vatican City here in Rome, where history is unfolding before our eyes.

Chicago-born Cardinal Robert Francis Provost is now officially the first American Pope. Pope Leo the 14th is the name

Provost has chosen, a name that means lion in Latin, named after a Pope Leo the 13th, who was known for championing workers' rights and social justice.

It was just after noon Eastern when our team here saw the unmaspeakable huff of white smoke from Sistine Chapel just behind me, that white smoke the signal that the 133 Cardinals who had been in the conclave for just over 24 hours had selected a new Pope, meaning at least 89 of them, obviously, probably significantly more, but 89, two-thirds had to support the Pope, and tens of thousands of people,

shoulder to shoulder, erupted in cheers at the site.

It was an outpouring of celebration of joy, and that is before anyone had any idea

who the new pontiff even was.

And then there was the announcement, and we had to wait a long time for that. As Pope Leo then

69 years old emerged on the balcony for the first time, that balcony straight behind me and the

roar of the crowd. It was deafening. And then the stunned. People were stunned. An American

Pope who spent much of his career ministering in Peru. It is something no one expected.

Maybe some had hoped, but no one expected.

The new pope clearly emotional.

You could see him sort of swallowing heavily,

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