Google has denied any such Bias, and while the question has dogged tech companies for years, there's no evidence of an anti-conservative or any other political tilt. While a statement from Google at the time said search results are not dictated by a political agenda but are generated by algorithms which are constantly being improved, Mr Pichai told Congress "we don't participate in partisan activities". "We engage with both campaigns. We support and sponsor debates on both sides of the aisle." Top committee Democrat Jerrold Nadler called the notion of bias a "delusion" and a "right-wing conspiracy theory". He said Tuesday's hearing was the committee's fourth to address the topic — and he suggested he would move on to other topics, like the spread of misinformation online and Russians' efforts to influence US elections online.