Encouraged by conversations he’s had with Vice President Kamala Harris, a billionaire venture capitalist has pulled his support for Donald Trump – and announced a “significant donation” for his Democratic opponent, according to a new report. The decision announced Friday by Ben Horowitz and his wife Felicia came three months after he and business partner Marc Andreessen faced criticism when they chose to throw their support to the former president. But that was before President Joe Biden jolted the race when he stepped aside, and their “great friend” Harris became the Democratic nominee. Want …