FILE - In this May 20, 2017 file photo, California state Treasurer John Chiang speaks at the California Democratic Party's annual convention, in Sacramento, Calif. California officials will take a detailed look at the potential to create a taxpayer-backed bank to handle what could be billions of dollars generated by the state's legal marijuana industry. Chiang stopped short of endorsing the idea Tuesday, Jan. 30, 2018, but said his office would work with the state attorney general to examine how a weed bank might function. (AP Photo/Rich Pedroncelli, File)