Former San Francisco Mayor Willie Brown addressed his past extramarital relationship with U.S. Sen. Kamala Harris in his weekly column Saturday, saying he may have boosted the presidential hopeful's career. "Yes, we dated. It was more than 20 years ago," Brown wrote in the San Francisco Chronicle. "Yes, I may have influenced her career by appointing her to two state commissions when I was [California] Assembly speaker. And I certainly helped with her first race for district attorney in San Francisco."