Well, it's kind of interesting. Impeachment is defined as requiring high crimes or misdemeanors, however...that definition specifically applies to the president and vice-president.
The legitimate causes for impeachment of judges is not actually defined.
Article III, Section 1 states that:
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, and shall, at stated times, receive for their services, a compensation, which shall not be diminished during their continuance in office.
So, really it could boil down to the interpretation of the phrase "good behaviour."
"..really it could boil down to the interpretation of the phrase "good behaviour."
I think you would be hard-pressed in finding anyone in congress that would take that to mean anything concerning their decisions. If you really intend on stirring up trouble - start impeaching federal judges for their decisions. I think you will find the original intent of "good behavior" means doing nothing unlawful almost akin to "high crimes & misdemeanors".