Supreme court and many other courts have judicial armed officers of the court that are part of the judicial branch; they can enforce contempt or orders of the court. But of course they are way overpowered by the number of LEO in the executive.
> Supreme court and many other courts have judicial armed officers of the court that are part of the judicial branch;
The Supreme Court, but not lower federal courts, has its own police department, but its legal authority is limited to security for the Supreme Court building and grounds and the Supreme Court justices, and to make arrests for violations of federal law as necessary to those two functions. They do not enforce orders of the court unrelated to those functions.
(For lower federal courts, these functions are performed by the US Marshals Service, a DoJ agency, which also does enforce other court orders; but, that's an executive not a judicial-branch agency.)
