Following a whirlwind tour of battleground states, Vice President Kamala Harris is attending a major San Francisco fundraiser Sunday with former House Speaker Nancy Pelosi, according to the Harris campaign. The Democratic presidential candidate is hoping to appeal to Bay Area donors by leaning on her strong local connections and the support of Pelosi, who has represented the city for nearly 40 years. Before she was vice president, Harris served as a California senator beginning in 2017. She was also San Francisco’s district attorney and California’s attorney general. Some 700 people are expect…