US Constitution, Article 2, Section 1, Clause 2: Method of choosing electors:
"Each State shall appoint, in such Manner as the Legislature thereof may direct, a Number of Electors, equal to the whole Number of Senators and Representatives to which the State may be entitled in the Congress: but no Senator or Representative, or Person holding an Office of Trust or Profit under the United States, shall be appointed an Elector."US Constitution, Article 2, Section 1, Clause 4: Election day:
"The Congress may determine the Time of chusing the Electors, and the Day on which they shall give their Votes; which Day shall be the same throughout the United States."
Something tells me the electoral college is going to be fuster cluck...like the rest of 2020