The portrait was painted during Trump's first term and was unveiled in 2019 in Denver. The Republicans in Colorado collected more than 10,000 dollars to commission the oil painting by Sarah Boardman, who also painted the portrait of former President Barack Obama that hangs on the same wall.
In a post on his social media platform Truth Social, Trump writes that Obama "looks wonderful", and that Boardman "lost her talent when she got older".
"No one likes a bad picture or painting of themselves, but the one in Colorado, in the state's congress building, which the governor, together with all other presidents, put up, was intentionally distorted to a level that even I, perhaps, have never seen before".
Sarah Boardman did not want to comment on Trump's outburst when the news agency AP contacted her, but told The Denver Post when the portrait was unveiled that it was important that her depictions of both Obama and Trump looked "non-political".