Senate Judiciary Chair Chuck Grassley (R-IA) dismissed concerns that Donald Trump’s racially tinged attacks against a federal judge of Hispanic descent are a sign he doesn’t respect the judiciary branch by citing the lawsuits Trump has won.

“He must respect the judiciary,” Grassley said Monday, according to Roll Call. “I’ve seen statistics that he’s won over 400 cases, only lost 30.”

Republicans have struggled to defend their support of Trump as their presumptive nominee while condemning his claims that U.S. District Court Gonzalo Curiel is biased against him because of his Mexican heritage. Curiel, who was born in Indiana, is presiding over two lawsuits against Trump University.

According to Roll Call, Grassley said that there was no reason to be worried about what kind of judges Trump would nominate as president, since they will have to be confirmed by the Senate.

“The president is only one-half of the process, as you know with [Judge Merrick] Garland. And the Senate’s the other half,” Grassley said, referring to the judge President Obama has nominated to the Supreme Court. “And we’re a check on the president.”

Grassley is among the Republicans blocking any Senate consideration of Garland, as they say the next president should pick late Justice Antonin Scalia’s successor.