Sen. Larry E. Craig said he had retained a lawyer to examine his case, suggesting that he may attempt to withdraw his guilty plea. That may be possible in some circumstances, legal experts say, but he would risk having more serious charges reinstated and the public exposure of other details of the restroom incident that has imperiled his congressional career. Ordinarily, Minnesota law allows defendants to withdraw plea agreements in limited situations where there has been "manifest injustice." Courts have interpreted that narrowly -- where prosecutors have not upheld their end of a plea bargain, for example, or where a...