Vice President <a href="https://en.wikipedia.org/wiki/Calvin_Coolidge" id="mwtw" rel="mw:WikiLink" title="Calvin Coolidge">Calvin Coolidge</a> becomes <a href="https://en.wikipedia.org/wiki/President_of_the_United_States" id="mwuA" rel="mw:WikiLink" title="President of the United States">U.S. President</a> upon the death of President <a href="https://en.wikipedia.org/wiki/Warren_G._Harding" id="mwuQ" rel="mw:WikiLink" title="Warren G. Harding">Warren G. Harding</a>.