Uh, actually it means quite a bit. This is a subpeona from the US Congress. Congress most definitely has jurisdiction to issue subpeonas. They also have the capacity to enforce them.
And the Florida SC has just told Congress to get lost. People go to jail for that.
Subpeonas and what they did last night are two different issues.. We are in Fed court now.. this is beyound the State's courts reach..
Fine, how exactly do they enforce them?