Citing dissatisfaction with his party's strategy on Iraq, Rep. Dennis J. Kucinich (Ohio) announced yesterday that he would run for the Democratic presidential nomination. Again. Kucinich, 60, a five-term House member and one of the most liberal members of his party, made an unsuccessful bid for the nomination in 2004. He stayed in the race long after it became clear he had no chance of success. The congressman said he would announce his candidacy today at City Hall in Cleveland, where he served as mayor in the late 1970s and plunged his city into a celebrated budget crisis over the...