President Trump will address the United Nations General Assembly today in what will be his second speech in front of the assembly since taking office. The address is scheduled to begin at 10:15 a.m.

Trump is expected in his speech to underscore his "America First" foreign policy.

Earlier, U.N. Secretary-General Antonio Guterres painted a bleak picture, pointing to rising polarization and populism within nations, ebbing cooperation among them and "fragile" trust in international institutions.

Guterres said "democratic principles are under siege" around the world.

Leaders and heads of state from more than 100 countries are attending the UN General Assembly this week, which runs through Oct. 5 in New York City.

The Associated Press contributed to this report.