Several readers, mostly from Alabama, have e-mailed to say that I shouldn’t give Artur Davis too much credit: He’s a reliable vote for liberals on most issues, he opposed Obamacare because he’s running for governor and cynically trying to appeal to a broader constituency, etc. I don’t dispute any of this. But when Democrats bend to the conservative will of the public, you won’t find me complaining. I’m more in the mood to cheer. What riles me up is the unspoken assumption of the Washington Post’s coverage: the idea that Davis is now some kind of traitor to his race because he violated the groupthink of the Congressional Black Caucus.