According to TechFlow, on October 5, venture capitalist and a16z co-founder Ben Horowitz and his wife Felicia announced that they would donate "a large sum of money" to the presidential campaign of US Vice President Kamala Harris. Just three months ago, Horowitz expressed support for former President Donald Trump. In an internal employee letter from a16z, Horowitz emphasized that the donation was a personal act, saying that he and his wife had known Harris for many years and she had always been "a good friend of both of us." The news was a blow to Trump. As the two candidates entered the final weeks of the campaign, which were also the most expensive weeks, the Trump campaign had far less cash on hand than Harris.