The <a href="https://en.wikipedia.org/wiki/United_States" id="mw2w" rel="mw:WikiLink" title="United States">United States</a> <a class="mw-redirect" href="https://en.wikipedia.org/wiki/Endangered_Species_Act" id="mw3A" rel="mw:WikiLink" title="Endangered Species Act">Endangered Species Act</a> is signed into law by President <a href="https://en.wikipedia.org/wiki/Richard_Nixon" id="mw3Q" rel="mw:WikiLink" title="Richard Nixon">Richard Nixon</a>.