President Donald Trump took to his favorite social media platform early Saturday to chastise the federal judge who ordered a nationwide halt of his recent executive order on immigration and refugees.

Writing on Twitter, Trump labeled that judge — Seattle-based federal district court Judge James Robart — a "so-called judge."

"So-called" is a label Trump often gives people who oppose him or disagree with him.

But now Democrats and liberals on Twitter are hitting back at the president, turning the tide on Trump and tweeting reasons why Trump is merely a "SoCalledPresident."

Even a congressman, Rep. Ted Lieu (D-Calif.), joined in by mocking Trump as the "so-called president."

Trump has not responded to the hashtag on Twitter, although he did write on the social media platform Saturday afternoon lamenting over the effects that Robart's ruling might have on U.S. national security.