An architect of the swift boat campaign that contributed to the derailment of John F. Kerry's presidential bid has created an exploratory committee for a run for the senator's seat in 2008. Jerome R. Corsi, a 59-year-old author from Denville, N.J., who co-wrote the antiKerry book ''Unfit for Command," took his first formal step toward challenging the four-term junior senator from Massachusetts. Corsi said Kerry was not fit to be senator. He said he was ''testing the waters to see if there's enough interest to support me to make the run feasible." Corsi has not yet registered with the Federal...