“The judicial power of the United States, shall be vested in one Supreme Court, and in such inferior courts as the Congress may from time to time ordain and establish. The judges, both of the supreme and inferior courts, shall hold their offices during good behaviour” (U.S. Constitution, Article III, Section 1.)
“Good behaviour” is undefined in the Constitution. So the bottom line is: Federal Judges can be impeached. Right now, Republicans control the House. They have the power to ramrod through impeachment of any judge that rules against Trump.
They don’t have enough votes in the Senate to convict and remove from office. But nothing’s to stop them from making political footballs out of federal judges, then blaming the Librul Democrats in the Senate for refusing to get rid of judges who, in their mine, rule against the Constitution – i.e. “bad behavior”. It also sends a message to the judiciary – rule in our favor or we’re going to haul you to Washington and make a public spectacle out of you, putting you in the worst light possible. These are the tactics of an authoritarian government to make the judiciary cow to the Commander in Chief.
And if I could think of this, you can bet your bottom dollar Steve Bannon has given this more than a little thought.