Senator Bill Nelson, who accompanied Sen. Chris Dodd and Sen. Lincoln Chaffee on an ill-timed junket to meet Venezuelan dictator Hugo Chavez, is in political trouble. As Richard Baehr predicted here in "Shilling for the new Castro" two weeks ago, his trip is already an issue with Florida's Latin America-savvy voters. In a panicky letter to a small local Vero Beach newspaper (a sure sign he's hearing from voters), Nelson defends his political tour in Caracas, repeatedly trying to assure Vero Beach readers that he was 'tough' on Chavez while there, and bringing up as much as he can the...