If you google your question, the first result will be of a site called US History. That is a great source for this. It says that Alexander Hamilton intervened and that Jefferson thought that he was the lesser of two evils. It also says that it took the votes of ten states to help Jefferson win the election.
In 13 short years Alexander conquered a mere 3,000 miles which stretched from Greece, through the Middle East, and to Central Asia and the Indian subcontinent.