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Google is making a mistake by not sending CEO Sundar Pichai to testify in front of a Senate committee about election interference, Sen. Mark Warner, D-Va., told CNBC on Wednesday. The Senate

Select Committee on Intelligence is holding a hearing next week to address the issue of Russian meddling in the 2016 presidential election and how to move forward. Twitter CEO Jack Dorsey

and Facebook COO Sheryl Sandberg are both expected to attend. However, Google's CEO is not, said Warner, vice chair of the committee. Instead, the company planned to send a lower-level

executive. "We want to talk about solutions. We've asked for the most senior executives. … [Google] ought to be part of this discussion and dialogue," Warner said on

"Power Lunch." "Chances are there's going to be an empty chair there. And I think there will be a lot more questions raised that could have been actually dealt with if

they sent a senior decision-maker and not simply their counsel." Google has been under fire recently from both sides of the aisle. On Tuesday, President Donald Trump doubled down on his

threats against Google, accusing the search engine of altering results to prioritize negative coverage and left-leaning outlets. "Google has really taken advantage of a lot of people

and I think that's a very serious thing and it's a very serious charge," Trump told reporters. "They better be careful because they can't do that to people." A

Google spokesperson responded on Tuesday, "When users type queries into the Google Search bar, our goal is to make sure they receive the most relevant answers in a matter of

seconds." When it comes to dealing with potential election interference, Google's parent, Alphabet, along with Twitter and Facebook, removed accounts tied to Russian and Iranian

propaganda efforts. Earlier this year, 13 Russians were indicted for alleged attempts to interfere in the U.S. presidential election. The latest Iranian activity was exposed by cybersecurity

firm FireEye. Warner said the issue isn't going away anytime soon. And while the U.S. is better prepared to defend against interference, he said potential adversaries are also getting

better. "We're just seeing the first generation," he said. Google did not immediately respond to a request for comment on Warner's remarks. _— CNBC's Ryan Browne and

Reuters contributed to this report._