Gov. Jerry Brown of California signed a controversial vaccination bill into law on Tuesday. David McNew/Getty Images hide caption

A man carries plastic single-use bags past the State Capitol in Sacramento, Calif. Starting in July 2015, California could become the first state to ban single-use plastic bags, unless a referendum delays the measure from taking effect. Rich Pedroncelli/AP hide caption

Sen. Ted Cruz, worked a rare Senate overnight shift as he kept up a lengthy diatribe against Obamacare (with many digressions.) Evan Vucci/AP hide caption

A Bay Area Rapid Transit (BART) train sits in the Rockridge station on Friday in Oakland, Calif. San Francisco Bay Area commuters were bracing for the possibility of a BART strike as a 30-day contract extension was set to expire Sunday at midnight. Justin Sullivan/Getty Images hide caption

Gov. Jerry Brown waits for the start of a news conference to announce plans to build a giant twin tunnel system to move water from the Sacramento-San Joaquin River Delta to farmland and cities. Rich Pedroncelli/AP hide caption

Jerry Brown (left) is sworn in as the 39th governor of California by California Chief Justice Tani CAntil-Sakauye (right) as Brown's wife, Anne Gust-Brown, looks on. Justin Sullivan/Getty Images hide caption