President-elect Donald Trump’s incoming “border czar” left a CNN host stunned with his frank, blunt response to any Democratic mayor or state official who actively participates in blocking federal immigration authorities from deporting people in the U.S. illegally after he takes office.In a segment this week, host Kasie Hunt played a two video clips — one of Denver Mayor Mike Johnston, who has promised to obstruct czar Tom Homan’s efforts to apprehend illegal immigrants. Johnston made headlines earlier for suggesting that he would like to see city police block federal immigration authorities from entering Denver, an action he compared to Tiananmen Square.