GLENDALE, Ariz. (AP) — Vice President Kamala Harris drew on her prosecutorial background to make her first expansive pitch on immigration to border-state voters as she and her new running mate, Minnesota Gov. Tim Walz, attracted thousands to a campaign rally in Arizona during their tour of battleground states. Harris, the former attorney general of California, reminded the crowd that she as a law enforcement official targeted transnational gangs, drug cartels and smugglers. “I prosecuted them in case after case, and I won,” Harris said in front of a crowd of more than 15,000 in Glendale, a suburb of Phoenix. “So I know what I’m talking about.”