A word for each, not necessarily mine:
Kerry- liar
Bush- liar
looks like we have a winner, folks.
I was watching a panel discussion on c-span the other night, and the moderator (from the ny post, I think) told a story of having had dinner with a former presidential candidate (he didn't say who) and he asked him what was the worst thing about running for president. The answer was, "all the lying you have to do".
The sad thing is, if the candidates always told the truth, they'd be crushed. Even Bush Sr. won election by lying about raising taxes, even if it cost him on reelection.