PAWTUCKET, R.I. -- Among the patrons at the News Café, an airy bar downtown, the debate erupted almost as soon as Representative Patrick J. Kennedy finished making his emotional appearance on a television above the liquor bottles and colored lights. Kennedy, the six-term congressman who represents this old factory city, said he would enter a rehabilitation clinic for his addiction to pain medication, a day after crashing his car into a barrier outside the Capitol in Washington, D.C. Bobby LaBonte was not impressed. ''He lost my vote, I'll tell you that," said the 58-year-old former Marine, who called himself a...