Sen. Blanche Lincoln (D-Ark.), whose state also will be visited by Bush this week, said she hoped Senate Democrats would act in unison to prevent the diversion of Social Security taxes to private investment accounts. "It's critical for what we stand for," Lincoln said. Reid told reporters he had received personal commitments from all Senate Democrats to oppose private accounts in Social Security. He added that one or two members might try "to keep their powder dry" by not declaring their opposition publicly at this point. The one Senate Democrat who remained uncommitted on the issue was Ben Nelson of...