Yes, Congress can overturn an Executive Order.
This list is quite disappointing. There isn't a single proposal on there that would have affected Aurora or Newtown, except No. 15 which is too broad and all-encompassing to assess at this point.
Then there is No. 16. Fear this one! "Doctors" will be asking their patients about guns in their homes!
It's bad enough that they have the right to interrogate my wife or children about any violence in the home, but we are left to hope that some abused wife or child may be saved in that matter. But now a list of the guns in people's homes? Who is the list for? Will there be a red sticker for all the homes identified as containing guns?