Senator John Cornyn’s campaign communications director, Matt Mackowiak, has a history of vicious, anti-Trump tweets and media quotes, The National Pulse can exclusively reveal.

Mackowiak, an establishment GOP consultant who once worked in the Bush administration, is leading the charge against Attorney General Ken Paxton in the Texas Senate run-off. He called January 6, 2021, “domestic terrorism” in tweets first unearthed by The National Pulse and shared on social media.

Furthermore, Cornyn’s campaign advisor Chris LaCivita, who once even worked for President Trump’s 2024 campaign, “liked” Mackowiak’s tweet.

Mackowiak deleted the tweet on Friday morning, after he became aware of this story. The National Pulse, however, archived the original, as well as dozens of other tweets, podcasts, interviews, and quotes from Mackowiak attacking the U.S. President and his team.

The National Pulse has scoured over a decade’s worth of Mackowiak’s political activity, which included pitching rejected op-eds to The National Pulse, which we will reveal more about in the coming days. Click here to support our important work.

‘GO F**K YOURSELF.’

In archived tweets from election day 2016, Mackowiak unleashed a tirade at Trump and his team.

“Go f**k yourself. You just conceded the most winnable election in 50 years against the least popular Dem nom ever,” Mackowiak incorrectly forecast.

“The lede of your NYT obituary will be that you are a loser, losing the most unlosable election in modern American history,” he added at the time.

“You win particular credit for running the most inept, unserious presidential campaign in a century. Staffed by clowns, wasting money,” Mackowiak continued.

“Your natural instinct will be to lash out at everyone. You own this defeat. It’s yours. You earned it. No one else. Process that.”

“Best case to make to drop out has to appeal to his ego and self interest,” he wrote.

Mackowiak also drew Trump’s family into his tirade, adding, “I wish the very best for Melania Trump and the children. For those to whom much is given, much is required. Be better than your father.”

RUSSIA HOAX.

Mackowiak’s Trump Derangement Syndrome (TDS) even extend to the Russia hoax and diplomacy, with the “Potomac Strategy Group” chief tweeting in 2018: “It is outrageous, dangerous and ridiculous for an American president to take Putin’s word over the US intelligence community. No American should defend it.”

The tweet was in reference to Trump’s claim that Putin did not interfere in the 2016 election – a long-established hoax peddled by the intelligence community in cahoots with the corporate media and establishment Democrats.

His ire extended through 2019, when he claimed: “Every single person who approve [sic] Doral for G7 should be fired.”

The matter was used by Democrats, led by Jerry Nadler, to launch another investigation into Trump that went nowhere.

‘DRUNK DRIVER’

“I think we’ve reached the crisis point in the campaign. He’s hemorrhaging support,” Mackowiak told CBS News in August 2016.

“The GOP has a drunk driver at the wheel, chugging vodka, and he’s got other people’s children in the car. He must be stopped,” Mackowiak said, adding, “I think it’s time for our leaders to make the case to him that he needs to withdraw. He’s going to lose this election on the current trajectory. He would be better off withdrawing. He can say the election is rigged. He wasn’t given a fair shot. He can go back to his business.”

‘A PURGE’

Mackowiak insisted through 2016 that Trump would lose, claiming: “I have will help [sic] every other Republican win this year, and then help rebuild the GOP after this disaster. A purge will be needed.”

Trump famously thumped Hillary Clinton in the 2016 election, and Mackowiak launched a podcast shortly after, featuring guests such as NeverTrumper Bill Kristol, MSNBC host Chris Matthews, and ardent anti-Trump voice and Bulwark contributor Mona Charen.

Now, he works as the campaign communications director for John Cornyn, working under LaCivita’s tutelage.

‘EXTINCTION-LEVEL EVENT’

The Hill newspaper also covered him, stating, “Trump is threatening the entire GOP, and it could take a decade to erase the damage. We are looking at an extinction-level event.”

Mackowiak’s anti-Trump screeds were not limited to 2016 or even 2020. He continued his anti-Trump and anti-MAGA tirades the next year, also stating: “Roughly half of ‘very conservative’ voters in Georgia said they would not vote in (Georgia Senate) runoffs because of Voter Fraud. Republicans conceded these races and President Trump is the cause.”

‘HANG HIMSELF.’

Opinion in a still publicly available podcast from 2016, Mackowiak predicted, of the now infamous televised debates: “We’ll see how he does in the first debate. I think that they’re likely to give him enough rope to hang himself.”

He added: “Donald Trump is not a base conservative… his commitment to the Republican party is zero. His commitment is to himself and so I think he’s a real danger to the process because he’s taking up oxygen from all the other serious candidates.”

At the time, Mackowiak found himself embroiled in a clash with a local Texas libertarian, who told KUT Austin: “I don’t even think Mackowiak is going to support the Republican nominee, who is probably going to be Trump… What kind of traitor to the party is Matt Mackowiak? The incredible amount of damage someone like him does to the party — and he’s a douchebag.”

The National Pulse has archived dozens of Mackowiak’s comments over the years, in which he attacks President Trump, backs Mike Pence’s actions on January 6th, blasts election integrity efforts, and states that he prefers “DeSantis, Pompeo, or some others over Trump for 2024.”

Late Friday afternoon, the independent “AMuse” account on X published a number of The National Pulse’s findings on Mackowiak, with more set to be published this weekend.

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TEXAS SENATE RACE: I wanted to belatedly thank @RaheemKassam for digging up the anti-Trump tweets from John Cornyn's campaign manager. They were slid into my texts without attribution – just found out we have him to thank. Give him a follow if you don't already! pic.twitter.com/kZN0JX7Dzz

— @amuse (@amuse) March 6, 2026