It is entirely possible at this point that the Marshalls could be ordered to arrest a Trump admin lawyer, who has been deemed being in criminal contempt of court, or some other LE official that’s been found to have committed a crime…

And then this person could then be defended by the Secret Service, or the other members of whichever armed LE group under the Executive branch…

Unnecessary: US Marshals Service is administered by Department of Justice of the executive branch headed by the president. Why pretend the president couldn’t simply pass down orders?