President Donald Trump faced one of the most monumental decisions of his presidency on Tuesday as he debated whether to join a war against Iran that risked sucking Washington into a new Middle Eastern conflict but also offered the chance to eliminate a rival’s nuclear program.

Just how close is Iran to developing a usable nuclear weapon? That question is at the heart of the Iran-Israel conflict -- and one that's driving how President Donald Trump responds -- but Iran's nuclear capabilities are still very much shrouded in mystery.

President Donald Trump has dismissed the assessment of U.S. spy agencies that Iran wasn't building a nuclear weapon before the latest conflict with Israel.

WASHINGTON − President Donald Trump threatened Iran's supreme leader with assassination as he pushed Tehran to give up its nuclear enrichment program and air strikes continued over Iran and Israel.

Iran conflict is pitting MAGA isolationists against traditional GOP hawks, as Trump contemplates what to do next.

In the span of about eight hours, President Donald Trump went from suggesting a nuclear deal with Iran remained “achievable” to urging Tehran’s 9.5 million residents to flee for their lives as he cut his visit to the international G7 summit short.

Iran and Israel continued to exchange attacks into Tuesday amid the latest round of conflict between the two nations.

Some longtime defenders of the president’s America First mantra are calling him out for weighing a greater U.S. role in the region.

President Donald Trump is under fierce pressure from inside Israel and his own MAGA base as he ponders the most fateful national security decision of either of his presidencies — whether to attempt a killer blow against Iran’s nuclear program.

President Donald Trump called on Tuesday for Iran's unconditional surrender and warned U.S. patience was wearing thin, but said there was no intention to kill Iran's leader "for now", as the Israel-Iran air war raged for a fifth day.

On June 15, Trump rejected an Israeli plan to kill Ali Khamenei, a senior U.S. official told USA TODAY. The U.S. official, who spoke on the condition of anonymity to discuss the sensitive talks, confirmed that Israel was presented with an opportunity to kill Khamenei but Trump objected to the plan and steered it off.