Nancy Pelosi has thrown her support behind Vice President Kamala Harris as the Democratic Party presidential nominee. The former House speaker formally endorsed her fellow Californian on Monday, about 24 hours after President Joe Biden announced he would end his re-election campaign after pressure from Democratic lawmakers – reportedly including Pelosi – who were concerned about his ability to win and serve a second term. “With immense pride and limitless optimism for our country’s future, I endorse Vice President Kamala Harris for President of the United States,” Pelosi said in a brief statem…