My friend David Davis once defended liberty. Now he has become its enemy | Henry Porter

He used to champion parliament as a protector against authoritarianism. These days, he’s happy to subvert itPoliticians and journalists rarely make good friends, but David Davis and I got on pretty well in the period we campaigned on civil liberties together during the last Labour government. We lunched, he came to my home for dinner, I introduced him to friends in New York and we often shared the same platform, notably in the Guardian debate at the Hay festival, when he and I took on Char