Why was there a crisis in the Electoral College in
the election of 1800?

Because the Constitution did not distinguish between President and Vice-President in the votes cast by each state's electors in the Electoral College, both Jefferson and his running mate Aaron Burr received 73 votes.

Explanation:

In the election of 1800, the Federalist incumbent John Adams ran against the rising ... stage was set for the first critical constitutional crisis of the new American federal republic. ... Electoral College Becomes Target of Manipulation ... The federal city had just begun to take shape when the government moved there in 1800

b. the american revolution