"A well-regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed."
To ensure that the president of the United States continues to understands that the Constitution is the law, that no man or women is above it, to stop infringing on it. To understand that no other government or foreign people (United Nations) can influence our constitution. The Second Amendment states that in order to maintain a free state, the people must retain the right to keep and bear arms, this includes purchasing ammunition. The presence of armed citizens is what keeps the government "honest". No government would be foolish enough to impose a dictatorship on people who have the ability to resist.