This is not a Democracy. It’s a Republic.
It's not a republic. It's a Constitutional Republic.
That statement is true but inadequate.
We are a Republic because America's founder wrote these words in the Constitution.
Article 1, Section. 4. The United States shall guarantee to every State in this Union a Republican Form of Government, and shall protect each of them against Invasion; and on Application of the Legislature, or of the Executive (when the Legislature cannot be convened), against domestic Violence.
To put the importance of that guarantee into its proper perspective The People’s Republic of China is a Republic with a Communist government.
The word "democracy" is not in America's Declaration of Independence or Constitution or in any Constitution of the fifty states.