who determines the number of presidential electors for a state
Electoral College (United States) Each state chooses electors, equal in number to that state's combined total of senators and representatives. There are a total of 538 electors, corresponding to the 435 representatives and 100 senators, plus the three electors for the District of Columbia as provided by the Twenty-third Amendment.[7] The Constitution bars any federal official, elected or appointed, from being an elector. The Office of the Federal Register is charged with administering the Electoral College.[8] Since the mid-19th century when all electors have been popularly chosen, the Electoral College has elected the candidate who received the most popular votes nationwide, except in four elections: 1876, 1888, 2000, and 2016. In 1824, there were six states in which electors were legislatively appointed, rather than popularly elected, so the true national popular vote is uncertain; the electors failed to select a winning candidate, so the matter was decided by the House of Representatives.[9]