I wonder what Libertarians for Trump think about this.

The tracking of US citizens by the government is one of the most dangerous things a government can do. As Edward Snowden would say, it sets up a turnkey system for totalitarianism.

And don't think such a plan would stop with international travelers.

The American Civil Liberties Union is good on this one.

 Jay Stanley, a senior policy analyst with the American Civil Liberties Union, blasted the idea in a written statement.