L.A. Mayor Karen Bass is the latest politician to back an unlimited state tax incentive for film and TV production, following a similar move by her rival, Councilwoman Nithya Raman , last week. Bass is facing a tough fight for reelection on June 2, and the dramatic downturn in production jobs has become a key issue in the race. As Assembly speaker, Bass helped pass the state’s original production credit lottery of $100 million. It has since grown to $750 million annually. On Friday, she called for eliminating the cap entirely — though, like others, without offering an estimate of what that would cost. “We are in a global battle for entertainment jobs, and we must hold nothing back in our fight,” Bass said in a statement. “This is about an industry that is essential to our middle class and who we are as a city.” Raman called for an uncapped tax credit on April 21, saying it was important to give studios certainty that they would receive a state subsidy if they choose to film in California.…