The United States has never once suspended elections; not even for the Civil War.

I do solemnly swear (or affirm) that I will support and defend the Constitution of the United States against all enemies, foreign and domestic; that I will bear true faith and allegiance to the same

-Presidential Oath of Office (empasis added).

Just not these:

The House of Representatives shall be composed of Members chosen every second Year by the People of the several States

-Article 1, Section 2

The Senate of the United States shall be composed of two Senators from each State, elected by the people thereof, for six years.

-Seventeenth Amendment