George Washington
At the end of his second term, Washington retired for personal and political reasons, fatigued and disgusted with personal attacks, and to assure a truly contested presidential election could be held. He did not feel bound to a two-term limit, but his retirement ultimately set precedent. The two-term limit to the presidency was formalized with the 1951 adoption of the Twenty-second Amendment to the United States Constitution. Washington is often credited with setting the principal of a two-term presidency, but it was Thomas Jefferson who first refused to run for a third term on political grounds.
Second inauguration of William McKinley
The second inauguration of William McKinley as President of the United States was held on Monday, March 4, 1901. The inauguration marked the commencement of the second term of William McKinley as President and the only term of Theodore Roosevelt as Vice President. McKinley died days into this term, and Roosevelt succeeded to the presidency.