A group of liberal lawmakers, including Sens. Bernie SandersBernie SandersNevada Democratic debate draws record-breaking 19.7 million viewers 'Where's your spoon?' What we didn't learn in the latest debate Ocasio-Cortez defends Warren against 'misogynist trope' MORE (I-Vt.) and Elizabeth WarrenElizabeth Ann WarrenWarren declines to disavow super PAC that supports her San Diego Union-Tribune endorses Buttigieg 'Where's your spoon?' What we didn't learn in the latest debate MORE (D-Mass.), want the administration to dig into the "ridiculous prices" they say Americans are paying for cable and the Internet. 

The two, joined by Sens. Ed MarkeyEdward (Ed) John MarkeyKennedy, Markey spar over experience in first Senate primary debate The Hill's Campaign Report: Bloomberg to face off with rivals at Nevada debate Massachusetts Democrats question deployment of Border Patrol teams to sanctuary cities MORE (D-Mass) and Al FrankenAlan (Al) Stuart FrankenAl Franken blasts Susan Collins: She'll let Trump 'get away with anything' Bill Press: Don't forget about Amy Key moments in the 2020 Democratic presidential race so far MORE (D-Minn.), sent a letter to Federal Communications Commission Chairman Tom Wheeler suggesting that because of limited options for consumers companies are able "to charge ridiculous prices and add hidden fees."

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“Many Americans have very few, if any, options when it comes to choosing their local cable and Internet provides," the senators said in a letter that was sent Thursday, but released on Friday. "As the telecommunications industry has become increasingly concentrated, this lack of choice has resulted in huge price increases and often poor services for customers." 

The senators said Wheeler's agency is required to keep track of how much consumers pay and want him to hand over the information, including how much consumers pay for cable and Internet on average by state and by company, as well as how much rural Americans pay versus urban Americans. 

The letter comes as the agency this week announced its review team for the proposed merger of Charter, Time-Warner Cable and Bright House Networks. If the merger is successful, the FCC says it will represent the second-largest broadband Internet provider in the country and the third-largest cable provider. 

The senators pointed to the merger as a reason to put "urgency" behind their request, adding that with increasing mergers "there are now de facto telecommunications monopolies throughout the United States." 

Sanders, who is running for the Democratic presidential nomination, said in a separate statement that “Americans deserve affordable access to the Internet, not hidden fees and rising prices," adding that he hopes Wheeler "will take action and continue to defend American consumers.”

The FCC declined to comment on the letter.

The issue of the FCC’s authority over Internet pricing is contentious. The business community and conservative lawmakers have said they think that the commission’s new net neutrality rules open the door to rate regulation. They say that by regulating broadband providers like utilities, the FCC can now seek approval over how much companies charge consumers for Internet access.

Wheeler has insisted that won’t be the case.

"Broadband providers will be able to adjust retail rates without Commission approval and without having to wait even a minute," the FCC said in a fact sheet about the net neutrality order.

— David McCabe contributed. This story was updated at 11:53 a.m.