https://www.usatoday.com/story/news/politics/elections/2016/2016/11/16/fact-check-could-electoral-college-elect-hillary-clinton-instead-donald-trump/93951818/
In the United States, the Electoral College refers to the group of presidential electors required by the United States Constitution to form every four years for the sole purpose of electing the president and vice president of the United States. Article II, Section 1, Clause 2 of the Constitution provides that each state shall “appoint” electors selected in a manner its legislature determines, and it disqualifies any person holding a federal office, either elected or appointed, from being an elector. There are currently 538 electors, and an absolute majority of electoral votes, 270 or more, is required to win the election.
https://en.wikipedia.org/wiki/United_States_Electoral_College