Backpage is known for allowing ads that offer adult services, and it became especially popular when Craigslist started banning them. Authorities believe it now earns $150 million in revenue every year. The company told investigators that it hires overseas contractors to screen advertisements. But Sen. Rob Portman (one of the people leading the investigation) revealed in Senate that it once ran a sex ad featuring a topless minor while it was also running an ad featuring a missing poster of the same child. "We'd certainly like to know what supposedly market-leading screening and moderation procedures missed that one," he quipped.

Now that the website is held in contempt, the Senate's lawyers can file a federal lawsuit that would force it to comply with the subpoena. Backpage's lawyer, Elizabeth McDougall, says the company has been waiting (even requesting) the subcommittee to take the issue to court for a long time, though. The website's defense is that it can post ads under the First Amendment's right to free speech and that the law protects websites that post third-party content. By going to court, the company will have the platform to fight for itself.

McDougall issued this statement before the voting began:

"For nine months, Backpage.com has respectfully, and repeatedly, asked the Senate to take the steps necessary to permit Backpage.com to obtain a review of the constitutional issues by judges, rather than by the same political figures who issued the subpoenas If the Senate now votes, as Backpage.com has long requested, to submit the issue to the courts, it will finally be authorizing the precise course of action the company has been urging for nine months. Backpage.com looks forward to a proper consideration of the important First Amendment constitutional issues by the judiciary—the branch of government charged with protecting the constitutional rights of all Americans."

It's worth noting that the Senate doesn't usually issue contempt charges. The last time it held an entity in contempt was back in 1995, when authorities were investigating then-President Bill Clinton's activities related to the Whitewater Development Corporation.