Sens. Cory Booker, Bernie Sanders and Elizabeth Warren have gotten together to criticize the acquisition of 21 regional sports networks by Sinclair Broadcast Group, asking what the FCC and the Justice Department might be doing about it.

The sports channels, which televise major professional and college sports to regional audiences, came up for sale as a condition of the Disney acquisition of what had been Fox assets.

“It is clear that Sinclair has an explicit interest in, and commitment to,

relaying partisan political messages to its viewers — making its recent anti competitive expansion attempts into millions of additional households all the more concerning,” the senators wrote.

Democrats, including the three 2020 presidential hopefuls, have been critical of Sinclair’s use of must-air segments featuring conservative commentary in their local newscasts in stations across the country.

Booker, Sanders and Warren mention favorable coverage of President Donald Trump on Sinclair-owned stations as part of their cause for alarm, but they also focus on potential effects on pricing of popular sports programming.