Sen. John Cornyn John CornynThe Hill's Campaign Report: GOP set to ask SCOTUS to limit mail-in voting Liberal super PAC launches ads targeting vulnerable GOP senators over SCOTUS fight Senate GOP faces pivotal moment on pick for Supreme Court MORE’s (R-Texas) campaign committee got into a war of words on Tuesday with comedian Patton Oswalt after tying tweets in which Oswalt used profanity to one of Cornyn’s 2020 Democratic challengers.

Oswalt appears in MJ Hegar’s video announcing her candidacy and tweeted her announcement to his 4.49 million followers. In response, Cornyn’s campaign committee tweeted censored screenshots of off-color jokes Oswalt has tweeted.

Hollywood Hegar supporter and video guest star, Patton Oswalt, has tweeted some offensive comments over the years, reply A or B to let us know which one is more offensive to you: pic.twitter.com/gXgPvstK6V — Team Cornyn (@TeamCornyn) April 23, 2019

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Oswalt fired back, mocking the account for censoring nonprofanity like “penis” and linking to a donation page for Hegar, calling it a “swear jar.” He also mocked a tweet in which Cornyn quoted Benito Mussolini seemingly without context, which the Texas senator later clarified was meant as a warning against an overly powerful government.

“Go tell your constituents about the time you babysat Chester A. Arthur, drink your Ensure, and sit down,” Oswalt tweeted.

I just noticed: you *****’d the word “penis.” Oh my god you Pepperidge Farm dipshit. Go tell your constituents about the time you babysat Chester A. Arthur, drink your Ensure, and sit down. https://t.co/iaGaJxCymU — Patton Oswalt (@pattonoswalt) April 23, 2019

In a follow-up tweet, Oswalt claimed Cornyn was “scared sh--less” of Hegar and was afraid to debate her, “so this is the straw he’s grasping at.”

If you're wondering why I'm being gummed by @TeamCornyn, it's because I'm in this ad for the extraordinary @mjhegar. @JohnCornyn is scared shitless -- he won't even debate her -- so this is the straw he's grasping at. Good luck, Pop-Pop! https://t.co/6JTYt9bNJT https://t.co/oEzrhhLr86 — Patton Oswalt (@pattonoswalt) April 23, 2019

Hegar, an Air Force veteran who narrowly lost to Rep. John Carter John Rice CarterDonna Imam wins Democratic runoff to face Rep. John Carter House panel advances bill banning construction on bases with Confederate names Democrats see victory in Trump culture war MORE (R-Texas) in 2018, announced her candidacy Tuesday.

“Texans deserve a senator who represents our values: strength, courage, independence, putting Texas first,” Hegar said in her announcement video.

Democrats have increasingly zeroed in on what they see as cracks in Republican dominance of the Lone Star State: President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE carried the state by 7 fewer points than Mitt Romney Willard (Mitt) Mitt RomneyBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power The Memo: Trump's strengths complicate election picture MORE did in 2012, and former Rep. Beto O’Rourke (D-Texas) lost to Sen. Ted Cruz Rafael (Ted) Edward CruzCruz blocks amended resolution honoring Ginsburg over language about her dying wish Trump argues full Supreme Court needed to settle potential election disputes Press: Notorious RBG vs Notorious GOP MORE in 2018 by only 2 points while boosting several down-ballot Democrats with his presence on the ballot.