President Donald Trump has authorized more than 4,000 National Guard troops and 700 Marines to respond to protests in Los Angeles. Here's what it means.

After persistent questioning from members of Congress, Defense Secretary Pete Hegseth turned to his acting comptroller, Bryn Woollacott MacDonnell, who provided the amount it would cost to send the National Guard and Marines to immigration protests in Los Angeles.

President Donald Trump has built his presidency around stretching the bounds of presidential authority, and his response to protests over an immigration crackdown in Los Angeles is no exception.