IF THE DEMOCRATIC PARTY WERE A movie, its title might be Small and Smaller. House G.O.P. leaders were especially gleeful about the prospect last week, saying they expect to preside this Wednesday over a caucus consisting of 232 members, one more than usual. The addition, they said, would be Greg Laughlin of Texas, who abruptly resigned two weeks ago from the Democratic Congressional Campaign Committee. Reports from Laughlin's home district indicated that he was about to leave the Democrats entirely. In anticipation, Republicans were signing a letter to welcome their newest recruit.
A Laughlin switch would be part of a notable...