National security adviser John Bolton's arrival at the White House increases the chances of a harder line on Iran.
Iranian Major General Qassem Soleimani, commander of the Islamic Revolutionary Guard Corps' Quds Force, has left the shadows for the spotlight.
The palace hosts the office of the country's president, Hassan Rouhani.
The protests in Iran may have blown up the president's dream of shredding that country's nuclear deal.
In 1953, the CIA backed a coup against democratically elected Iranian Prime Minister Mohammad Mossadegh, restoring absolute power to the Shah.
In 2017, Trump was sued on First Amendment grounds over blocking his critics online.
Iranian officials accused the U.S. of once again meddling in their internal affairs and offered to help Trump address his own hunger problem.
Secretary of State Rex Tillerson said Wednesday that he was surprised by the president's sudden announcement.
Major General Abdolrahim Mousavi, head of Iran's army, said there would be no Israel in 25 years. His Arab rivals in the Persian Gulf appear to differ.
"I have a Twitter account and I think it is a suitable tool for public diplomacy, connecting to people around the globe and voicing our ideas."
Rouhani had a resounding win but angered hardliners with his comments during the campaign, and they are likely to create problems for him.
The industrial disaster in north-eastern Iran is the most deadly in the Islamic Republic for decades.
New footage emerged of Iran's Qaher F-33 stealth fighter jet, which Western critics said was further away from its first flight than Tehran claimed.
The United States is expected to impose sanctions on multiple Iranian entities as early as Friday following Tehran's recent ballistic missile test.
Under Iran's settlement with the United States, France, Germany, Britain, Russia and China, Tehran agreed to shrink its nuclear program to satisfy the powers that it could not be put to developing atomic bombs.
President Hassan Rouhani sees Congress's vote to extend the sanctions act for 10 years as a violation of the nuclear deal.
The Russian president is meeting his Iranian counterpart, Hassan Rouhani, next week.
The recent Iranian elections changed the game. But the supreme leader remains firmly in control.
The cartoon contest, planned for June, will "incite hatred, racism, and discrimination," says UNESCO chief.