President-elect Donald Trump’s border czar Tom Homan vows to instill harsh consequences on sanctuary city leaders who are threatening to block immigration authorities from carrying out their planned mass deportation — telling them plain and simple: “Don’t test us.”

Mike Johnston said he would not comply with any federal orders to deport illegal immigrants and implied he would go to great lengths to do so.

Denver Mayor Mike Johnston (D) is ready to stand up for immigration in his sanctuary city regardless of what policies