The president only has the authority granted to him by the constitution and the bill of rights specifically forbids him from infringing on our right to keep and bear arms.
Leaving the sleeping dog that is the Emancipation Proclamation lie. It is worth noting that Frank Roosevelt was able to intern American citizen's without due process during World War II; his newly expanded and democrat supporter packed Supreme court ok'd the decision as constitutional.
The problem is that someone has to be willing to stand up and say no when unconstitutional laws and decrees are made. Few are willing to take Andrew Jackson's view of the court and tell them to enforce their decision.
Ultimately governments rule by the consent of the governed... Make Obama enforce his stupid rules.