The four top candidates in California’s increasingly tight, brutally-fought Senate race will debate for the final time Tuesday night–and Donald Trump is likely to share the spotlight. Former baseball star Steve Garvey is the only Republican scheduled to appear with Democratic Reps. Adam Schiff of Burbank, Katie Porter of Irvine and Barbara Lee of Oakland in the one-hour debate, which will be televised live from the Universal Studios Hollywood Lot. It will be available through Peacock, Roku, Samsung TV Plus, Amazon FireTV and NBCLA on Facebook and YouTube and Telemundo 52 on Facebook and YouTub…