The Senate MUST ratify any treaty and they can't even pass a budget. What makes you think they will approve the UN Arms Treaty?
Do you have any references on the executive orders?
The UN Small arms treaty is an Ace in the hole should the dog and pony show not work on the federal level....and Trust me it will pass the Senate.
Here is a list to all the Orders....you can go to www.whitehouse.gov and find a list of all these mentioned to research them yourself.
Capt Here is a Link to get you started: http://www.westernjournalism.com/a-comprehensive-list-of-obamas-worst-executive-orders/