Analysts also point out that Comcast is remarkably well connected in Washington. In fact, its chief lobbyist, David Cohen, was a guest at the White House state dinner for the French president on Tuesday night.
Comcast persuaded government agencies to approve its $30 billion bid for NBCUniversal in 2011. At that time it agreed to a number of conditions that were designed to prevent anticompetitive behavior. It could be compelled to do the same in this case.
On Wednesday night, some of the public interest groups that opposed the NBCUniversal deal, like Free Press, signaled immediate opposition to the consolidation involving Time Warner Cable. "Stopping this kind of deal is exactly why we have antitrust laws," Free Press said in a statement.
--CNN's Evan Perez contributed reporting to this article.