Aaron Burr
Burr conspired to form a new country in Mexico. He wanted to be present if and when Spain and Mexico went to war. Some people, including President Thomas Jefferson, who had picked a different vice president for his second term, saw Burr's actions as treason. However, in 1807 Burr was found innocent of the charges. He was often thought of by his enemies as unreliable. Burr died in 1836.