President Donald Trump mocked Sen. Mitt Romney, R-Utah, at a rally Thursday in Latrobe, Pennsylvania, claiming Romney “couldn't be elected dog catcher right now in Utah.”

"Utah, the home of our worst senator... that's Mitt Romney,” Trump told supporters. "Romney couldn't be elected dog catcher right now in Utah."

Romney was elected to the Senate in 2018, handily beating Democratic challenger Jenny Wilson by over 31 points. Romney previously served as the governor of Massachusetts and was the Republican presidential nominee in 2012, but lost to incumbent Democratic President Barack Obama.

Romney has been an ardent critic of Trump, recently slamming him for attacks on mail-in voting and the handling of the COVID-19 pandemic. In February, Romney backed an article of impeachment against Trump due to his controversial dealings with Ukraine.

Trump attacked Romney after the impeachment vote.

“Had failed presidential candidate @MittRomney devoted the same energy and anger to defeating a faltering Barack Obama as he sanctimoniously does to me, he could have won the election,” Trump tweeted in February.

Trump has also mocked Romney’s support for the Black Lives Matter movement. In June, Romney marched with Black Lives Matter protesters following the death of George Floyd.