The Constitution does not address firearms- it addresses "arms"- meaning weapons. When written, defense of the country- against internal or external enemies, was based on the ability of the citizens at large to resist- by force- which requires being able to keep and carry weapons. The citizens in general were the body of the "militia".
None. Like abortion, deaths involving firearms are caused by people.
the Articles of Confederation
By amendment.
The framers added the commerce clause to the Constitution because it prevents states from passing their own trade laws.
gun control
It does not say that in the Constitution. Felony firearm rights are a matter of Federal Law and state laws that say a person convicted of a felony shall not possess, use, transport, sell, purchase, carry, ship, receive, or distribute firearms.
Not everywhere. In the US, law abiding adults have the right to own and use firearms. This is guaranteed both by various state laws, and by the 2nd Amendment to the US Constitution.
Data not tracked and compiled beyond states
Missouri voters have the right to make a new law or add an amendment to the constitution by (who are what)
Many states signed the Constitution
new york state
by making the amendments