From left, German Chancellor Angela Merkel, British Prime Minister Theresa May and French President Emmanuel Macron. The three nations are calling on Trump to honor the Iran deal. CREDIT: Dan Kitwood/Getty Images Europe/Getty Images
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Russia ramps up pressure on Trump to honor Iran nuclear deal
Russia joined a chorus of voices Monday urging US President Donald Trump to stand by the Iran nuclear deal, as Tehran sent a stern warning that it was an "all or nothing" situation.
