Rep. Ted Lieu (D-Calif.) responded on Saturday to President Trump Donald John TrumpHR McMaster says president's policy to withdraw troops from Afghanistan is 'unwise' Cast of 'Parks and Rec' reunite for virtual town hall to address Wisconsin voters Biden says Trump should step down over coronavirus response MORE's claim that he's a "very stable genius," arguing that people who are, in fact, geniuses don't feel the need to boast about it.

"Human experience tells us that people who are geniuses don't go around saying they are geniuses," Lieu wrote on Twitter. "Same also applies to people who are very stable."

Human experience tells us that people who are geniuses don't go around saying they are geniuses. Same also applies to people who are very stable.



By the way, @realDonaldTrump also ran for President in 2000. Another day, another series of bizarre tweets & lies from #stablegenius https://t.co/ngZ4hc7l5u — Ted Lieu (@tedlieu) January 6, 2018

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In another tweet, Lieu shared an exchange he had with his son, in which his child said Lieu sounds "mental" and "weird" when he said that he is "stable" and "really smart" — a reference to Trump's claim.

"Me: I want to let you know I'm very stable.



Our son Austin: That sounds weird.



Me: I also want to let you know I'm like, really smart.



Austin: You seem mental today."



A child points out again that the Emperor has no clothes.#stablegenius https://t.co/gWimBlrwIv — Ted Lieu (@tedlieu) January 6, 2018

In a series of tweets on Saturday, Trump lashed out at critics who have raised questions about his mental health, saying that he's not only "really smart," but a "very stable genius."

"Actually, throughout my life, my two greatest assets have been mental stability and being, like, really smart,” he wrote in one tweet.

The tweet came after the release of a new book, "Fire and Fury: Inside the Trump White House" by author Michael Wolff, which includes provocative and unflattering claims about the president, including doubts among Trump’s senior aides about his mental fitness for office.