http://www.archives.gov/exhibits/charters/constitution_amendments_11-27.html
U.S. Constitution
AMENDMENT XII
Passed by Congress December 9, 1803. Ratified June 15, 1804.
... "But no person constitutionally ineligible to the office of President shall be eligible to that of Vice-President of the United States."
Good to hear that... I thought there was a big loophole there...
I guess President Arthur violated that provision two times in two offices...