John Peralta counts Democratic and Republican Presidential and Vice-Presidential candidates since 1980, and sees how many lawyers there were:
[Democratic] Attorneys (10 out of 12 total - 83%)
[Possibly Gore, who never graduated — if he's included, the percentage is 92%]
Carter was the only non-lawyer, non-law school attendee.
[Republican] Attorneys (2 out of 9 total - 22%)
Non-lawyers - McCain, Palin, Bush 43, Cheney, Kemp, Bush 41 and Reagan