Candidate Trump said he'd build that wall on the Mexican border and crackdown on "sanctuary" cities that harbor undocumented immigrants. As President, he's ordering implementation — despite massive cost, dispute about whether America will be safer — and civil liberties issues. He doesn't need any new legislation to build the wall, but lawyers are lining up to argue about withholding federal money from sanctuary cities. It's still not clear what's in store for "dreamers" — who were brought here illegally as children and don't know any other country.
Campaign promises aren't all made to be broken
Stephen Legomsky - Washington University School of Law - @WashULaw, Josh Blackman - South Texas College of Law / Cato Institute - @JoshMBlackman, Mike Stoker - agricultural law attorney, Marielena Hincapié - National Immigration Law Center - @MarielenaNILC