U.S. Presidential election is on November 3. Electoral College votes on December 14.
This year, because of corona-virus , millions of citizens have requested for mail-in absentee ballot. The post office which is supposed to deliver to the homes these mail-in absentee ballots has said they will not be able to deliver them on time before the November 3 election day.
Therefore it is potentially difficult to declare a sure winner on November 3. The Electoral College may not be able to select the winner. Even if there is a winner, the loser will likely go to the Supreme Court.
What if there is a deadlock? There will be a Contingent Election.
The newly elected House of Representatives will vote for the President. Here is the tricky situation. Each State has one vote irrespective of number of congressman from each state*. Therefore 50 votes for 50 States. Whoever gets 26 votes will be declared winner. Right now Republicans have majority in 26 States. If this continues after the election also, Trump will be declared as a winner.
The Vice President will be elected by the Senate. Each Senator has one vote. There are 100 Senators. Who ever gets 51 votes will be declared as Vice President.
If the Democrats win the Senate, they will elect Kamala Harris as Vice President. It will be interesting, fun, and a big entertainment if Donald Trump becomes President and Kamala Harris becomes Vice President.
* California has 53 House of Representatives. Vermont has 1 House of Representative. But they both have 1 vote in the Contingent Election.