https://www.sfchronicle.com/business/article/Warren-wants-to-regulate-tech-Silicon-Valley-is-13674716.php > Sen. Elizabeth Warren introduced a crowd-pleasing proposal Friday in her bid for the Democratic presidential nomination: Break up the biggest technology companies, including Amazon, Facebook and Google. > In a blog post, the senator from Massachusetts promised “big, structural changes” to the tech sector, including undoing some of the mergers that have enriched the tech giants. The policy would also prevent those companies from using their service to sell other goods and services that they own.