On Politics: Iran Threatens to Exceed Nuclear Limits

Good Tuesday morning. Here are some of the stories making news in Washington and politics today.

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Iran announced on Monday that it would soon violate a central element of the 2015 nuclear deal — by producing more uranium than allowed — unless it gets European help to offset the effects of American sanctions. The White House, in turn, ordered another 1,000 troops to the Middle East.

President Trump had said North Korea and Iran could be convinced to give up their nuclear weapons programs. He is learning that it’s not so easy.

Confused about the back-and-forth over the Iran deal? Here’s an explainer.

When Mr. Trump rode down that escalator four years ago, his candidacy seemed like a sideshow. Today he kicks off his re-election bid as the dominant force in politics, and voters will decide before long whether 2016 was a fluke or a transformative moment.