6:30 p.m.: More than 100 people gathered at the immigration services building and detention center in downtown Los Angeles to protest the raids. DHS officers fired pepper balls at the protesters before the Los Angeles Police Department dispersed the crowd.

From Seattle to Austin to Washington, D.C., marchers have chanted slogans, carried signs and snarled traffic through downtown avenues and outside federal offices.

White House "border czar" Tom Homan said that protests in Los Angeles are complicating immigration raids, making them more "difficult" and more "dangerous."