Iran maintains ties with a range of countries, including Turkey, India, Russia and China. Yet in this war, their support is mostly rhetoric.

The opening days of the conflict are challenging the idea that President Trump can project force abroad while safeguarding American lives and the economy.

Even as some top targets held on, lawmakers in both parties were pushed into runoffs by challengers in Texas, while some in the North Carolina state legislature lost.

The world’s smartest technology is no match for the U.S. tax code.

President Trump’s simple campaign promise, now reality, includes lots of fine print that is confounding taxpayers and companies this filing season.

Agency officials promise fast reviews of new treatments while vowing they will not be a “rubber stamp” for the industry. But patients with rare diseases view recent decisions as signs that the doors are closing on their options.

The C.I.A. has given small weapons to Iranian Kurdish forces in Iraq in a covert program that began before the current war.

Texas voters will revisit the Republican Senate primary — and some House races where no candidate captured more than 50 percent of the vote — in runoffs on May 26.