The state’s power grid operator is calling on Californians to conserve energy on Wednesday. The California Independent System Operator, which oversees the state's electrical grid, says it expects above average temperatures to increase demand for electricity.Reporter: Angela Corral, The California ReportFormer Central Valley Congressman TJ Cox pleaded not guilty Tuesday to more than two dozen federal counts including wire fraud, money laundering and campaign contribution fraud.Reporter: Soreath Hok, KVPR California has begun a big push to get more 4-year-olds enrolled in transitional kindergarten, or “TK.” But not every parent of an eligible child is ready to sign up.Reporter: Daisy Nguyen, KQEDThe oil industry has dropped its opposition to a bill that would increase fines on California refineries that violate air quality rules. That's after lawmakers watered down the legislation behind closed doors.Reporter: Ted Goldberg, KQED Sidewalks in front of Kaiser facilities in Northern California and the Central Valley are packed with striking mental health care providers again on Wednesday. State regulators are monitoring the situation closely to ensure patient care is not impacted. Reporter: Lesley McClurg, KQED Learn more about your ad choices. Visit megaphone.fm/adchoices