If there's anyone who knows how to spot a dishonest politician, it's former Nixon White House Counselor John Dean.

Via The Hill, Dean took to Twitter this week to call out Trump for being ignorant and dishonest in ways that he's never seen before.

Dean isn't the only one to notice Trump's dishonesty, of course, as Trump's misstatements, conspiracy theories and lies have confounded fact-checking websites for the past several years.

This also isn't the first time that Dean has publicly bashed a post-Nixon Republican White House, either -- he was harshly critical of the Bush administration, whose members he believed should have been prosecuted for war crimes over the use of torture during the war against terrorism.