House Democrats are urging the Federal Communications Commission (FCC) to investigate reports that the Sinclair Broadcast Group has conspired with other broadcasters to raise local advertising costs.

In a letter to FCC Chairman Ajit Pai sent Tuesday, Reps. Frank Pallone Jr. Frank Joseph PallonePharma execs say FDA will not lower standards for coronavirus vaccine Dem chairmen urge CMS to prevent nursing homes from seizing stimulus payments Federal watchdog finds cybersecurity vulnerabilities in FCC systems MORE (D-N.J.) and Mike Doyle Michael (Mike) F. DoyleHillicon Valley: Facebook removed over 22 million posts for hate speech in second quarter | Republicans introduce bill to defend universities against hackers targeting COVID-19 research | Facebook's Sandberg backs Harris as VP pick House Democrats pressure Facebook oversight board to address racist, voter suppression content Hillicon Valley: Facebook civil rights audit finds 'serious setbacks' | Facebook takes down Roger Stone-affiliated accounts, pages | State and local officials beg Congress for more elections funds MORE (D-Pa.), the top Democrats on the House committee overseeing the FCC, said that the commission should look into the possibility that Sinclair had conspired with Tribune Media, which it's trying to acquire.

“An FCC investigation is warranted in light of recent reports that the Department of Justice (DOJ) is investigating whether the sales teams of Sinclair and Tribune were improperly coordinating regarding their advertising sales performance, resulting in higher rates,” the two Democrats wrote. “Moreover, Sinclair has a history of improperly exercising de facto control over stations it did not own, further supporting the need for review.”

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Pallone and Doyle said that such an investigation should be separate from the administrative law proceeding that the Sinclair-Tribune merger has been referred to after Pai said he had “serious concerns” about the deal.

That proceeding would likely dampen the $3.9 billion merger’s chances of approval.

A spokeswoman for Pai said the office has received the letter and is reviewing it.