00353nas a2200085   4500000000100000008004100001260004400042100001500086245016600101       2021                            d  bNaval Postgraduate SchoolaMonterey, CA1 aElvis Chan00aFighting Bears and Trolls: An Analysis of Social Media Companies and U.S. Government Efforts to Combat Russian Influence Campaigns During the 2020 U.S. Elections