A debate within the Republican Party over the meaning of 'America first' has erupted as President Trump considers involvement in Israel's attacks on Iran. Trump's base is divided over his openness to deploying U.S. warplanes against Iran, with some arguing it goes against his promise to steer the nation out of foreign entanglements. Views of the United States across 24 countries are down nearly universally since last year, with confidence in Trump's leadership also declining in most places.