f Senator Larry E. Craig resigns Saturday as expected amid accusations that he solicited sex in an airport restroom, his successor will be chosen by a fellow Republican who knows better than most what voters in this deeply conservative state will tolerate when it comes to the private behavior of public officials. .... Some top Republicans say that the relationship between Mr. Otter and Mr. Risch is frosty, that their styles are different and that Mr. Otter would prefer someone like Mr. Simpson, a conservative from eastern Idaho with whom he served in Congress. Mr. Simpson has made nuclear energy...