Sen. Elizabeth Warren (D-Mass.) is among six Democratic senators urging the Justice Dept. and the FCC to reject Comcast’s merger deal with Time Warner Cable.

Six Democatic senators in states directly affected by the Comcast-Time Warner Cable merger want it canceled, and are urging regulators to reject the deal.

Sens. Elizabeth Warren (D-Mass.), Al Franken (D-Minn.), Richard Blumenthal (D-Conn.), Ed Markey (D-Mass.), Ron Wyden (D-Ore.), and Bernard Sanders (Ind.-Vt.) today signed a letter asking the Justice Department and the Federal Communications Commission to block the merger.

“We write to urge the FCC and DOJ to reject Comcast’s proposed acquisition,” reads the letter, organized by Sen. Al Franken (D-Minn.). “Should the transaction survive … we believe that Comcast-TWC’s unmatched power in the telecommunications industry would lead to higher prices, fewer choices, and poorer quality services.”

The six senators went straight to the top, addressing Attorney General Eric Holder and Federal Communications Commission chairman Thomas Wheeler. At least one House member is also opposed. Rep. Tony Cardenas (D-Calif.), represents a district in Los Angeles served by Charter Communications and Time Warner Cable. Customers of both companies in Los Angeles would be served by Comcast if the merger is approved.

Comcast’s reputation precedes it, and Time Warner Cable customers have overwhelmingly told regulators they’d prefer to keep the current cable company many loathe instead of taking a chance with Comcast, rated the worst company in the United States by Consumerist.com.

“We have heard from consumers across the nation, as well as from advocacy groups, trade associations, and companies of all sizes, all of whom fear that the deal would harm competition across several different markets and would not serve the public interest,” the letter adds.