Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. Silicon Valley Becomes Punching Bag for Presidential Hopefuls Michelle Quinn SAN FRANCISCO - U.S. presidential candidates have long come to Silicon Valley to raise money and, with a tech company campus as a backdrop, talk about innovation and the future. But this year, things are different. The 2020 presidential candidates are contending with the so-called "tech-lash," the populist backlash against "Big Tech" over a host of issues, including data leaks, wealth accumulation, alleged erosion of worker rights, claims of censorship of conservative voices and concerns about the proliferation of extreme speech online. Some political hopefuls are part of the tech-lash. .