He later added: "I'm not there yet. I'm trying to be the best councilmember I can be."
It would be a quixotic run at best. No non-Democrat has won a citywide office regularly scheduled citywide race, except for those at-large councilmembers who, like Brown, have taken advantage of protected non-Democrat set-asides. Assuming Fenty draws a legitimate Democratic challenger and proceeds to beat him or her, it's unclear how the addition of non-Democratic votes could put Brown over the top.
But, hey, a race is a race. Brown expounded on a potential platform a bit -- "We need to talk about a different kind of transparency in government." -- adding that, as mayor, he would keep Michelle Rhee as schools chancellor, "but change her governing style."
Dunno how Rhee would feel about that.