The former host of "Adam Ruins Everything" said "monopoly capitalism" means fewer shows and jobs in the industry.
George Conway, husband of White House Counselor Kellyanne Conway, tweeted that if President Donald Trump had ordered former White House economic adviser Gary Cohn to pressure the Justice Department to block the AT&T-Time Warner merger, it would "unquestionably be grounds for impeachment."
AT&T is bidding for Time Warner, Disney for Fox. But viewers are the last thing on their minds.
Distribution companies are looking to acquire content as viewers cut their cable cords and go mobile.
If approved, the merger would give the telecom company control of HBO, CNN, TBS, Warner Bros. and more.
The deal values Time Warner Cable at $78.7 billion.
A deal would create a major rival to Comcast Corp, the biggest U.S. operator in the U.S. cable and broadband market.
A cable subscription will no longer be needed to view HBO's content