The top Democrat on the Senate Judiciary Committee on Monday called for an immediate congressional hearing on a proposed merger between Time Warner Cable and AT&T.

“This proposed massive consolidation of distribution and content raises potentially serious questions about competition, consumer choice, and privacy across the media, cable TV, wireless and broadband industries,” Sen. Patrick Leahy, D-Vt., the ranking member on the Senate Judiciary Committee, said in a statement Monday. “Given the potential impact for consumers, the Senate Judiciary Committee should hold a public hearing on this proposed merger without delay. The antitrust regulators must also carefully consider whether it will benefit consumers in Vermont and across America.”