His bills addressed truancy among school children, preschool access, suicide prevention, childhood obesity, reducing air pollution, smoke-free workplaces, and the creation of opportunities for at-risk youth. One bill introduced by DeSaulnier, AB 1617, would have restricted tobacco smokers from purchasing tobacco products via the internet. The bill was vetoed by Governor Arnold Schwarzenegger. Another DeSaulnier bill, AB 2235, which would require that a biometric feature be incorporated into all new handguns sold in California. For the Live Earth concert in July 2007, DeSaulnier delivered the Democratic weekly radio address on steps people can take to reduce their carbon footprint. DeSaulnier was elected to the California State Senate in November 2008, representing the 7th Senate district which includes most of Contra Costa County. DeSaulnier received early support from the Contra Costa Central Labor Council, the Contra Costa Building Trades Council and the California League of Conservation Voters. He received 98% of the vote in the June 2008 Democratic primary election against write-in candidates; former Assemblyman Joe Canciamilla initially was to challenge DeSaulnier for the Senate seat, but dropped out of the race. In the 2008 general election, DeSaulnier received 66.6% of the vote against Republican Christian Amsberry. In the Senate, DeSaulnier was the chair of the Labor and Industrial Relations committee, and a member of the Health, Transportation and Housing, and Appropriations committees. He was also the chair of the select committees on Constitutional Reform and Growth Management. DeSaulnier authored over 20 bills that addressed the ability of workers to designate their treating physician prior to an injury, providing for greater prescription drug safety, supporting increased funding for alcohol-abuse programs, expanding electronic recycling and funding for climate protection. He supported Senate Concurrent Resolution (SCR)3 to propose to California voters the question of whether to call a convention to reform the state constitution. In September 2009, DeSaulnier amended SB 88 to attempt to restrict the ability of local governments to shed pension programs through bankruptcy protection. In 2012, DeSaulnier proposed a bill, SB1366, that would require gun owners whose guns are stolen or lost report the fact to police within 48 hours. Failure to comply would result in fines on the first and second offenses, with higher fines and possible jail on the third. The bill was endorsed by the Brady Campaign to Prevent Gun Violence and the California Police Chiefs Association, and opposed by the California Rifle and Pistol Association.