Secretary of State Marco Rubio, however, made advances in this year's informal poll about who might succeed Trump.
One month after US and Israel launched strikes on Iran, the conflict has escalated across the Middle East.
Iraq turning into 'expanding battleground' in war, which began on February 28 with US-Israeli strikes on Iran.
Iranian opposition leader calls on Trump administration to 'stay the course' as the US and Israel wage war on Iran.
Islamabad's diplomatic push bears fruit as the world watches for signs of a broader breakthrough.
Thick, black smoke rose from Kuwait International Airport Saturday after suspected Iranian drone strikes caused damage.
Thick, black smoke rose from Kuwait International Airport Saturday after suspected Iranian drone strikes caused damage.
Gulf nations seek new defence partnerships as Iran war escalates.
Arrests come days after force announced U-turn, saying that despite High Court ruling, 'terror' ban remains in place.
Israeli social media posts show a strike in the Israeli city of Eilat.