The estimable Keith Humphreys has made what I believe to be a misguided attack, at least in the general case, on the critics of Jim Messina’s Tory turn. I think he is being a too credulous of Messina and a little naïve about politics.

Great Britain is largely ruled by 2.5 (2.25?) political parties, the primary two of which are the Tories on the right and Labour on the left. Now, Humphreys is correct to argue that, were the American Republican Party to adopt wholesale the Tory platform, they would on many major issues find themselves in agreement or even to the left of the Democratic party and the center American politics would shift very far to the left.

But that’s not what Messina is doing or trying to accomplish. What he is trying to accomplish is doing his level best to ensure that Tories, rather than Labour, governs the United Kingdom. This suggests that, if you model politics purely as a hyper-rational act of selecting a set of optimal policies and supporting the political coalition that most closely reflects that set, that Messina’s policy set is delicately balanced to the left of the GOP but to the right of Labour. This is entirely possible! But I’m going to venture that it’s quite unlikely, and it’s more likely that Messina doesn’t have policy views this well-developed.

There is another way to look at politics – as a struggle between groups over rights, privileges, wealth, and power in society. In this view, for example, you could look at politics everywhere as a struggle between “workers/labor” and “business/capital” and believe that direction takes precedence over position and therefore endorse the pro-worker/labor party in general with substantial (if not total) disregard for whether workers in one country are better or worse off than those in another.

Now, I’ll admit to not being terribly well-versed on what, at this very moment, are the key differences between Labour and the Tories going into the next UK election. But what I do know is if you asked me this question:

“Will British workers be better off 50 years from now if Labour wins the majority of elections between now and then or if the Tories win the majority of elections between now and then?”

I could rather confidently answer that question with “Labour.” There are indeed certain situations where the leftist party in certain countries is endorsing foul or noxious platforms, is corrupt or has engaged in substantial misconduct, or is simply nomination odious leaders, that one might considering wavering from this heuristic (let’s call it “solidarity” for old-times sake) but these are still exceptions. In this case, it is entirely possible that Messina has strong personal feelings about David Cameron or Ed Milliband or some item in Labour’s platform or simply believes in maintaining a certain balance-of-power between labor and capital but I’m going to go ahead and say that the Tories wrote him a big check and he’s cashing it with little regard for the substance of the politics, and lacking a clear reason to the contrary it is perfectly acceptable for American progressives to reflexively support Labour and question a Democratic Party figure who would support the Tories.