“It isn’t just us first,” she said, referring to Trump's "America first" policies. “We live in a big country and a big world," she said. "You can’t just want to help someone in a hurricane and not make sure they can go to the doctor when they’re sick.”

Trump reiterated his "America first" doctrine in a speech to the United Nations General Assembly this week, emphasizing that America would put its people first just as other nations should put their people first, which he said would bring about international security and prosperity.

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"As president of the United States, I will always put America first, just like you as the leaders of your countries will always and should always put your countries first," he said at Tuesday in New York.

Trump has also emphasized an "America first" stance on international trade and domestic manufacturing.

Michelle Obama said that “things are tough right now” and “we’re being tested." The former first lady says she "continues to be hopeful" that things will improve.

When pressed by an audience member to run for president in 2020, she quickly shot back, "Oh, no! ... Running for office is nowhere on the radar screen, but continuing in public service is something I will do for the rest of my life.”