First of all one may want to know the meaning of an electoral college.
An electoral college is a group of presidential electors required by the constitution to form every four years for the sole purpose of electing a president and a vice president.
As long as you’re a United States citizen, 18 years of age or older, you probably think you have the right to vote for presidential candidates in the national election, but the truth is, when citizens cast their ballots for president in the popular vote, they elect a slate of electors. Electors then cast the votes that decide who becomes president of the United States.
How Does the Electoral College choose A President?
When it comes to this process, a candidate must receive 270 of the 538 electoral votes to become a President or a Vice President.when a candidate for President fails to receive 270 votes, the electoral college will have to choose the President from among the three individuals who received the most electoral votes. Electors are not free agents,they are only supposed to vote for the candidate whom the State’s voters have chosen.