Greer is now in contempt of congress. I would like to see him arrested.
When all is sorted out within the coming weeks, it will be determined that Congress has no authority in this case and that it was a blatant abuse of power to attempt to intervene.
As far as arresting Greer, Congress COULD hold him in contempt of Congress. Actually that's funny because I think the natural state is for most Americans to be in "Contempt of Congress". LOL!