Steve Duin, writing in The Oregonian, remarks that “at 74, Nader’s stamina, like his anger, shows no sign of fading. He has no intention of abandoning the stage to presidential candidates who don’t share his standards of fairness, his advocacy for single-payer national health insurance, or his disdain for compromise.”
And he quotes Ralph Nader on the difference between the Republican and Democratic parties:
“The velocity with which their knees hit the floor when corporations pound on their door.”
A great answer as far as it goes, but it doesn’t tell us which party gets down faster.