Although California entered the Union as a free state, the framers of the state constitution wrote into law the systematic denial of suffrage and other civil rights to non-white citizens. Some authorities went so far as to attempt to deny entry of all African-Americans, free and slave, to California. The Legislature passed a bill that would ban the immigration of free blacks to California. State Senator David C. Broderick, a fierce opponent of slavery and former firefighter from San Francisco, managed to kill the bill through parliamentary maneuver.