Trump's speech at the UN was written by Steven Miller, who along with Steve Bannon, packaged Trump as the "America First" presidential candidate. The UN exists to bring nations together to deal with issues that cannot be settled by any single nation. Trump's speech was not intended to promote the UN's role as a deliberate body able to solve complex issues. He declared that he would put America's interest first and that all nations should behave as he does. Who needs the UN??? Certainly, Trump's base does not need the UN. His speech was intended to show his shrinking base that a powerful president in the White House is all that they need. Trump continues to behave like the presidential campaign candidate that Miller and Bannon created. He has no idea about how to behave like a president.