The Party of the Lawyer Candidates vs. The Party of the Non-Lawyer Candidates:

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%)
Obama
Biden
Kerry
Edwards
Lieberman
Clinton
Dukakis
Bentsen
Mondale
Ferarro
[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%)
Dole
Quayle

Non-lawyers - McCain, Palin, Bush 43, Cheney, Kemp, Bush 41 and Reagan