If the negotiations fail, Trump repeatedly has threatened to attack Iran.

Iran wants to make a "deal" more than the U.S., President Donald Trump said Tuesday, ahead of a third round of bilateral talks in Switzerland later this week.

If the negotiations fail, Trump repeatedly has threatened to attack Iran.

If the negotiations fail, Trump repeatedly has threatened to attack Iran.

Iran's top diplomat arrives in Geneva for crucial talks amid new U.S. sanctions and escalating tensions over nuclear ambitions.