This is GPS, the Global Public Square.

Welcome to all of you in the United States and around the world.

I'm Farid Zakaria.

Today on the show, Michael Bloomberg.

The former mayor of New York City has challenged Donald Trump on climate change, guns and other things.

But is he ready to challenge him for the presidency?

I will ask in an exclusive interview,

I can't very much about this country as you know, I've devoted my life and all my net worth to trying to make the world a better place.

Also, it's been three months since women in Saudi Arabia have been allowed behind the wheel.

I'll talk to Manala Sharif who fought hard for that right.

So why hasn't she been able to participate?

Find out when we talk to her.

But first, here's my take.

When confronting a challenging problem, it's sometimes useful to listen to someone who looks at it from an entirely different angle.

That's why I found it fascinating to talk about the rise of populism and nativism with Bono last weekend at a summit in Kiev.

The Irish singer activist philanthropist sees the same forces that we all do, particularly in Europe,

but he zeroes in on something intangible yet essential.

The only way to counter the dark pessimistic vision being peddled by nationalist and extremist, he says, is to have an uplifting, positive vision.

He told me Europe needs to go from being seen as a bore, a bureaucracy, a technical project, to being what it is, a grand, inspiring idea.

To that end, Bono's band YouTube has been choosing a moment during its concerts to unfurl, wait for it, the flag of the European Union.

Europe is a thought that needs to become a feeling Bono writes in a recent op-ed in the German newspaper, Frankfurt-Alge Miner's Item.

He's trying to give that feeling, meaning, to him Europe is about the ability of countries that were once warring to live in peace for people of many different lands and languages to come together.

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