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

I'm Farid Zakaria coming to you live from London today.

On today's show, a Secretary of State fired, a poison spy, and a Kremlin holds elections.

First up, the American Secretary of State gets fired via Twitter.

What does Rex Tillison's departure mean for America and the world?

Then, a poisoning in Britain sets off a major international incident with Russia.

The United Kingdom will now expel 23 Russian diplomats.

Where does the furrow over a former spy go from here?

It's also election day in Russia.

But that really begs the question, will Putin be president for life?

I'll ask one of his opponents, Zania Sobchuk.

But first, here's my take.

If confirmed a Secretary of State, Mike Pompeo will arrive at a department that has been battered by proposed budget cuts,

hollowed out by resignations and vacancies, and neutered by President Trump's impulsive and personal decision-making style.

But Pompeo's most immediate challenge will not be rebuilding the department or restoring morale.

It will be dealing with an acute foreign policy crisis that is largely of the president's own making, regarding the Iran nuclear deal.

Now, Pompeo will have to tackle a genuine foreign policy challenge soon.

President Trump has agreed to meet with Kim Jong-un before the end of May.

This could be a promising development, yet before Trump even sits down with Kim to discuss a nuclear deal,

the administration will have to decide how to handle the pre-existing deal with the Iran.

From the outset, Mike Pompeo has cheered Trump in his hard-line posturing toward Iran.

Trump has announced that America will no longer abide by the Iran nuclear pact,

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