Key House Dem wary of members 'demagoguing' on AT&T merger

Antitrust review will occur within the Justice Department and the Federal Communications Commission (FCC). 

Still, Congress will get a word in, helping shape the political debate about the merger. Watt will question the CEOs of AT&T and T-Mobile's parent company, Deutsche Telekom, in a hearing on Thursday. 

But that doesn't mean playing a role in whether the merger goes through, Watt emphasized. 

"It's not our job to be out there to be demagoguing on one side or the other," he said.