British Prime Minister Theresa May says she trusts Trump President Trump and British Prime Minister Theresa May will be among more than 130 world leaders expected for meetings at the United Nations General Assembly. May will raise important global issues, including the Iran nuclear deal and the use of chemical weapons by Russia. "CBS This Morning" co-host John Dickerson visited the prime minister's official residence at 10 Downing Street in London for her only interview ahead of the U.N. General Assembly.