The Senate Select Committee on Intelligence left a chair empty after Google executives declined invites to testify at a hearing on foreign meddling in the 2016 U.S. presidential election.

"I'm deeply disappointed that Google — one of the most influential digital platforms in the world – chose not to send its own top corporate leadership to engage this committee," Warner said.

"I'm disappointed Google decided against sending the right senior level executive," Burr, the chair of the committee, said in his opening remarks.

The Senate Select Committee on Intelligence intentionally set up an unoccupied seat to shame Google parent company Alphabet at Wednesday's hearing on foreign meddling in the 2016 U.S. presidential election .

While the committee wouldn't accept Google's counsel in lieu of Page or Pichai, Walker submitted testimony anyway and will be in Washington this week taking meetings and giving briefings, according to a Tuesday blog post. The testimony outlined Google's new guidelines for political ad disclosures and states that Google continues to remove bad actors, like the Kremlin-affiliated Internet Research Agency, that try to mislead users.

However, the Campaign for Accountability published a report on Tuesday that seemed to highlight the challenges of keeping deceptive content off of Google's platforms: The organization posed as the IRA and was still able to buy and target politically divisive advertising.

Politically, it's been a rough summer for Google. In July, the European Union slapped the company with a $5 billion fine for antritrust abuse of its mobile operating system, Android. At the beginning of August, Google drew both internal and external criticism after its plans for a censored search app in China leaked to the press.

Then, at the end of the month, President Donald Trump accused Google of liberal bias, including the false assertion that it had promoted all of former President Barack Obama's State of the Union speeches, but not his.

By not showing up for the Senate hearing, Google may have avoided answering some uncomfortable questions unrelated to election meddling. For example, Warner told Wired that he planned to question Google about its plans in China and during the hearing, Sen. Tom Cotton, R-Ark., said that he would have asked Google about that, too, as well as the company's decision not to renew a controversial Pentagon contract.

"Perhaps they didn't send a witness to answer these questions because there is no answer," he said, "And the silence we would hear right now from the Google chair would be reminiscent of the silence that that witness would provide."