Since taking office in January, Trump has upended US foreign policy, slashing foreign aid, imposing tariffs on friend and foe alike and cultivating warmer - if volatile - relations with Russia. At the same time he has sought, so far with only limited success, to solve some of the world's most intractable conflicts. Some 150 heads of state or government are expected to address the chamber this week, including Trump, who is the second scheduled speaker after the session opens at 9am EDT (1300 GMT). Trump will speak eight months into a second term marked by severe aid cuts that have sparked humanitarian worries and have raised doubts about the UN's future, prompting UN Secretary-General Antonio Guterres to try to...