HR 810, the Stem Cell Research Enhancement Act of 2005, was passed on July 18, 2006. The enactment of HR 810 would allow for federal funding of stem cell research. It was immediately vetoed by President George W. Bush. An attempt to override the veto by the House of Representatives failed. Mississippi senators Thad Cochran and Trent Lott, both voted in favor of the bill.

In 2007 U.S. Senate passed the Stem Cell Research Act of 2007. S. 5, 110th. The proposed bill was an amendment to the Public Service Act and would allow for stem cell research using human embryos. Mississippi Senators Cochran and Lott voted in favor of S. 5, 110th. The bill was vetoed by President Bush.

Also in 2007, the United States Senate ...