NBC News' Valerie Castro explains the work of the U.S. Agency for International Development and the impact it will have if President Trump succeeds in closing it.

Larry Summers, Former U.S. Treasury Secretary, joins Andrea Mitchell to analyze President Donald Trump's new tariffs on ...

Elon Musk said he and Trump want to shut down the agency because of its purportedly “radical” work, but the controversy seems mired in partisan politics.