Amid push to rein in big tech firms, government alleges tech giant looking to 'neutralize or eliminate rivals in online ad marketplace through acquisitions, forced use of products

A lobbying group of outlets hurt by loss of ad revenue wants tech giants to start paying for their content, but critics fear giving the social media juggernaut an even bigger edge

Move sets social media site apart from Facebook which defends running paid political ads, even false ones, as a free speech priority; Trump campaign manager calls decision 'dumb'