https://www.reuters.com/article/us-elizabethwarren-technology/u-s-presidential-hopeful-warren-wants-breakup-of-google-facebook-and-amazon-idUSKCN1QP1M0 >Senator Elizabeth Warren said on Friday that if elected U.S. president she would seek to break up tech companies Amazon.com Inc, Alphabet Inc's Google and Facebook Inc as part of a structural change to the sector aimed at promoting competition.