Ex-Clinton Aide Ickes Backs Dean for DNC By WILL LESTER WASHINGTON (AP) - Harold Ickes, a leading Democratic activist and former aide to President Clinton, said Friday he is backing Howard Dean to be chairman of the Democratic National Committee - giving a powerful boost to the front-runner. ``I think all the candidates who are running have strong attributes, but Dean has more of the attributes than the others,'' said Ickes, who considered running for chairman himself before dropping out in early January. ``Many people say Howard Dean is a northeastern liberal, he is progressive, but his tenure as governor...