How was the election of 1840 different from other elections?

The Electoral College vote was a tie, 73 to 73 between Thomas Jefferson and running mate Aaron Burr. (In those days, there was only one vote for president and vice-president combined and each elector got two votes, with the second place finisher becoming vice-president. One of the electors should have listed someone else for VP, but all the Jefferson supporters voted for the both Jefferson and Burr. )Therefore, the House of Representatives chose the President. Burr saw his chance to be president and refused to resign . ) Opponents of Jefferson saw their chance to thwart Jefferson and maybe get some concessions from Burr if he was made president. After much political maneuvering, Jefferson was elected. The 12th amendment that changed the election process was ratified before the next election.