“No man is above the law, and no man is below it.”
― Theodore Roosevelt, Third Annual Message to Congress, December 7, 1903

Sources:
http://www.presidency.ucsb.edu/ws/?pid=29544
http://millercenter.org/president/roosevelt/speeches/speech-3775
https://www.brainyquote.com/quotes/quotes/t/theodorero118459.html