President-elect Donald Trump made "illegal immigration" a primary part of his campaign. Recently he criticized so-called "sanctuary cities" in the U.S., threatening to cut off federal funding to any city that resists the federal government on immigration enforcement.
What exactly are sanctuary cities and what can Trump really do to stop them? Watch today's Seeker Daily video to find out.
CNN:Trump condemns sanctuary cities, but what are they?
SF Gate: SF programs at risk under sanctuary city defunding
PEW Research: 5 facts about illegal immigration in the U.S.