American citizens have written rights which are outlined in the US Constitution.
It is the oldest written Constitution in the world and is the supreme law of the land, and all citizens are subject to its provisions.
It is very difficult for anyone, president, politician or normal citizen to change the Constitution.
The first ten Amendments of the Constitution protect all of the basic freedoms of all Americans and are known as The Bill of Rights. The two most famous are Amendments the first and second.
Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof; or abridging the freedom of speech, or of the press; or the right of the people peaceably to assemble, and to petition the Government for a redress of grievances.
Americans believe that freedom of speech and expression are the lifeblood of any democracy. To debate and vote, to assemble and protest, to worship, to ensure justice for all - these all rely upon the unrestricted flow of speech and information. In his campaign to become President, Donald Trump has exercised his right to freedom of speech.
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.
This is the now controversial constitutional amendment which allows American citizens the right to own a gun. It is possible for an American to purchase very sophisticated military equipment.
In the aftermath of several mass shootings there have been calls for gun laws to be amended and even for there to be a new constitutional amendment. The pressure group the National Rifle Association (NRA) is well supported, funded and opposes such reform.