His criticism extended to social media, where Reiner posted a series of sharply worded messages during Trump’s presidency. In 2018, he referred to Trump as a “childish, moronic, mentally unstable malignant narcissist”. In a number of posts on X, Reiner wrote, “Trump flip flops, does 180s. But the one thing he’s consistent with is every day he breaks the law,” and in another post added, “The convicted felon president can continue to lie to his followers, but when the truth starts to affect their lives, they will abandon him.”