The head of Google told Congress Tuesday that the firm has no political bias, pushing back against President Trump and top Republican lawmakers who say the world’s largest online search engine stifles content from conservative news outlets and personalities.

“I lead this company without political bias and work to ensure that our products continue to operate that way,” GoogleCEO Sundar Pichai said on Tuesday in highly anticipated testimony before the House Judiciary Committee. “To do otherwise would go against our core principles and our business interests.”

The hearing was called by House GOP leaders to shine the spotlight on Google’s search algorithms, which Republican critics say suppress conservative viewpoints and give prominence to liberal media voices because Silicon Valley’s work force leans left politically.

House Majority Leader Kevin McCarthy, California Republican and member of the judiciary panel, cited statistics that show Google is responsible for 90 percent of all internet searches, but warned that there was a “widening gap of distrust between tech companies and the American people.”

“We need to be sure than any political bias within Google’s workforce does not leak into its search product,” the California Republican said.

Democrats came out in defense of the firm, with the committee’s ranking member, Rep. Jerry Nadler, New York Democrat, dismissing the idea that Google and other tech companies display any anti-conservative bias as a “fantasy” driven by Republicans.