Sen. Tom Cotton’s (R-AR) office has started sending out warning letters to liberal activists who have bombarded the senator with phone calls and letters.

The Arkansas Times reports members of activist group Ozark Indivisible have been receiving cease-and-desist letters ordering them to stop trying to contact Cotton..

“This letter is immediate notification that all communication must cease and desist immediately with all offices of US Senator Tom Cotton,” the letter states. “All other contact will be deemed harassment and will be reported to the United States Capitol Police.”

One person who received the cease-and-desist letter tells the Arkansas Times that Cotton’s actions show that the senator does not have respect for any constituents who have differing views.

“I believe if Tom Cotton’s office were to respond as to why they sent this letter, I think they just honestly don’t want to listen to any citizen’s opposing view or hear the numerous grave concerns U.S. citizens have about the serious & ongoing attack on our Democracy,” the constituent writes.

Cotton’s office responded to say that it only sends out such letters in extreme circumstances.

“If an employee of Senator Cotton receives repeated communications that are harassing and vulgar, or any communication that contains a threat, our policy is to notify the U.S. Capitol Police’s Threat Assessment Section,” a spokesperson told THV 11.

Cotton staffer John Noonan writes on Twitter that one person who received the letter only did so because they called an intern a “c*nt” over the phone.

update: tone was threatening, no threats made. But c-word invoked.

— John Noonan (@noonanjo) 18. siječnja 2018.