List the three major institutions (branches) of the United States government established by the Constitution and the corresponding Constitutional Article number that explains how each branch is to function. Which branch is not subject to elections?

List the three major institutions (branches) of the United States government established by the Constitution and the corresponding Constitutional Article number that explains how each branch is to function. Which branch is not subject to elections?
Note: Your response should be a minimum of 50 words and include the citation of your source, using MLA style (including “in-text” citation). No part of the citation will be included in the word count.