reconsider - Senate rules permit one motion to reconsider any question decided by vote, if offered by a Senator who voted on the winning side. Normally a supporter of the outcome immediately moves to reconsider the vote, and the same Senator or another immediately moves to table this motion, thus securing the outcome of the vote.
Congressional Sessions lists all Congresses and corresponding years - from 1789, when the 1st Congress met, through the current Congress.
You can access legislative information, by bill number or key words, from the THOMAS Web site. Information from the present back to the 93rd Congress (1973) is available on THOMAS.
For information on the Senate, Congress, the legislative process and the federal government, the Virtual Reference Desk is a good place to begin.