Conservative pundit Tomi Lahren is dressing up as comedian Kathy Griffin for Halloween, mocking Griffin's now infamous photo shoot in which she posed with a prop resembling President Donald Trump's decapitated head.

Lahren posted a picture to social media of herself in costume, captioned it "Trump Derangement Syndrome," and tagged Griffin.

The photograph was clearly meant to provoke Griffin, whose original shoot is featured below.

Lahren also posted the picture to Instagram.

“He ruined me. Sometimes I do things and you may wonder, Kathy, where is your head at? Well folks, I’m taking matters into my own hands,” she wrote, in part.

Griffin soon responded, calling Lahren a "dumb, racist, and talentless hack."

"I thought images like this one incite violence!" Griffin wrote, a reference to much of the criticism she received from Lahren and other conservatives for her protest against the president.

Lahren's soon fired back.

If all of this sounds childish, consider that the two women have a history of sparring.

In May 2017, Griffin posted a video of herself holding a prop meant to resemble President Trump's severed head.

"I caption this 'there was blood coming out of his eyes, blood coming out of his...wherever," she wrote at the time, referencing a past comment Trump made about former Fox News anchorwoman Megyn Kelly.

Griffin was savaged for the image, and several members of the Trump family criticized her. Soon afterward, she removed the photo from her social media accounts and asked for forgiveness. The backlash cost Griffin marketing deals and her spot on CNN's New Year's Eve broadcast with Anderson Cooper. The FBI and Secret Service investigated her to determine if she was, in fact, a threat to the president. In the fall of 2017, Griffin retracted her apology.

“I didn’t commit a crime,” she would later tellThe Hollywood Reporter. “I didn’t rape anybody. I didn’t assault anybody. I didn’t get a DUI. I mean, my God, there are celebrities that fucking kill people.”

The incident spurred a controversy on the limits of First Amendment rights. Lahren was one of Griffin's more prominent critics. Soon after the photo shoot, Lahren called Griffin a "demented a-hole."

Griffin called Lahren an "evil, horrible shell of a human being."

Last month, after months of criticizing Griffin, Fox News invited Griffin to interview with Lahren for Fox Nation, the network's upcoming digital streaming platform. Griffin declined.

“Thought maybe you’d like to defend and discuss your Trump Derangement Syndrome on the most-watched cable news network. Guess not! Have a nice day," Lahren wrote Griffin afterward.

More as this story develops.