This is GPS, the Global Public Square. Welcome to all of you in the United States and around the world. I'm Farid Zakaria.

We'll begin today's show with the shocking shooting on that beltway ball field.

What does it say about how divided America is? How angry her people are at each other?

What are the chances of real reconciliation between the parties and amongst the American people?

Are people who have studied and worked on just these issues?

And another area sharply divided the Middle East, the split between the Gulf States and Qatar.

What will bring the crisis to a close? I will ask Qatar's former Prime Minister.

Also, the Trump boom. Why have American stock markets gone up and up and further up while the country is mired in political turmoil and paralysis?

Ruchir Sharma will offer his explanation.

Finally, America's census counts its people every 10 years.

This country is embarking on a census to count its islands. And there are thousands of them.

But first, here's my take. This week's shooting at a Congressional baseball practice was a ghastly example of the political polarization that is ripping this country apart.

Political scientists have shown that Congress is more divided than at any time since the end of reconstruction.

I for one I'm struck not simply by the depth of partisanship these days, but increasingly it's nature.

The feeling seems to me that people on the other side of the divide are not just wrong and to be argued with.

They are immoral and must be muzzled or punished.

This is not about policy. The chasm between left and right during much of the Cold War was far wider than it is today.

Many on the left wanted to nationalize or substantially regulate whole industries. On the right they advocated a total rollback of the New Deal.

Compared to that, today's economic divisions feel relatively small.

Partisanship today is more about identity.

The scholars Ronald Engelhardt and Pippa Morris have argued that in the last few decades people who began to define themselves politically less by traditional economic measures and instead by identity, their gender, race, ethnicity, sexual orientation.

I would add to this mixed social class something rarely spoken of in America but a powerful determinant of how we see ourselves.

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