The leftist media only makes a big deal out of it because they consider Haggard a hypocrite. The left has no trouble with someone being a degenerate or a criminal, as long as the person is not on record as condemning something he in which he is involved. So, if Haggard had been an openly gay/drug-using preacher, that'd be cool with them.
They didn’t even want to entertain the allegations made by Larry Sinclair against Barack Obama.