plus, in the age of rising populism and fearmongering, i talked to costa rica's president-elect, carlos alvarado, about how he won a surprise landslide on a progressive agenda. >>> good evening, everyone, and welcome to the program. i'm christiane amanpour in london. >>> america has a new secretary of state. at his swearing in today flanked by president trump, mike pompeo said that the u.s. will soon decide what to do about the iran nuclear deal. and the clock is ticking for trump to make that decision. as european and other signatories t hard to save a deal that after all contains iran's nuclear program. the french president, emmanuel macron tried during a touchy-feely state visit to the white house last week and in australia today he insisted the deal is working. but as designed, he agrees that it's time to add something extra. >> as we negotiated, we signed it, it's good to respect it. and that for me, a good beginning. is it sufficient or not? i mean, my view, it's not sufficient. i don't know what the u.s. president will decide the 12th of may. i just want to say, what his decision will be,