Presumptive GOP presidential nominee Donald Trump Donald John TrumpObama calls on Senate not to fill Ginsburg's vacancy until after election Planned Parenthood: 'The fate of our rights' depends on Ginsburg replacement Progressive group to spend M in ad campaign on Supreme Court vacancy MORE supporter and former House Speaker Newt Gingrich isn't on board with Trump's attacks on a federal judge.

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“I don’t know what Trump’s reasoning was, and I don’t care,” Gingrich said in an email to The Washington Post. “His description of the judge in terms of his parentage is completely unacceptable.”

Trump has continually bashed U.S. District Judge Gonzalo Curiel, who is overseeing the lawsuits over Trump's real estate education program, Trump University. Trump claims that because Curiel is of Mexican descent he is inherently biased against Trump and should recuse himself. Curiel was born in Indiana to immigrant parents.

"I think I’m going to do very well with Hispanics, but we’re building a wall. He’s a Mexican. We’re building a wall between here and Mexico," Trump said in a CNN interview.

Speaker Paul Ryan Paul Davis RyanKenosha will be a good bellwether in 2020 At indoor rally, Pence says election runs through Wisconsin Juan Williams: Breaking down the debates MORE (R-Wis.), shortly after endorsing Trump, also condemned Trump's argument against the judge, saying he "completely disagrees" with his reasoning.