Well, Volkh certainly writes pursuasively, but his opinion seems to "hinge" on the belief that there is
a significant difference in political philosophy between the Dems and Republicans.
I mean, there are differences, man-to-man, but the chief preoccupation of politicians as a group is
greed and power-lust. I don't believe for a second that these guys have the interests of a nation of people at heart, they just say what we want to hear, and then go about getting elected and then...well, we see what we continue to see.
I especially dislike "Line Voting" for the simple reason that if you elect a whole block (i.e., Dems or Repubs) of these people, all you've done is enabled a whole chunk of
similarly-minded criminals. They get to loot the nation's coffers
much more efficiently.
It's much better, I think, to keep 'em all off-balance wherever possible. Slow the rascals down.
Repub President? Quick, get a Dem congress and keep 'em at each other's throats. Sometimes this puts them in a position where they get to 'showing off' and accidentally do something that is beneficial
for We The People, instead of their corporate sponsors.