Judicial Power: How Is It Enforced?

I'm just asking here, but how does a judge like Greer enforce his edicts? Who has done his bidding in preventing Congress and the Governor of Florida from acting on behalf of Terri Schiavo? Does the judge have his own personal army? It sounds like the the old Medieval times. Different factions vie for power, and the one with the best army wins. Why didn't congress subpoena Greer? He would have refused to come before congress for a hearing, and could have been arrested for contempt of congress. Just asking.

I'll be back

CC