LAS VEGAS (AP) — Vice President Kamala Harris has used her appearances in Los Angeles and Las Vegas on Sunday to poke at Republican Donald Trump over crowd sizes, his refusal to debate again and his privileged background. During a fancy fundraiser in Los Angeles, she told donors that as she campaigns around the country her “crowds are pretty big.” In Las Vegas, she talked about her middle class background and compared it to Trump’s “silver platter” pedigree that nonetheless produced six bankruptcies. Harris also moved into what Trump considers his terrain — immigration — with a Friday visit to the border town of Douglas, Arizona.