Pompeo insists 'tide is turning' on China

Pompeo also said that the U.S. closed the Chinese consulate in Houston because it was a "den of spies."

Pompeo is testifying at a Senate Foreign Relations Committee hearing for the first time in 15 months, discussing the State Department's annual budget request.

Foreign Relations Committee Democrats released a report this week that harshly criticized Pompeo's tenure at State, saying he had harmed the department's ability to conduct diplomacy by leaving jobs open for months, treating career diplomats poorly and promoting a culture of retaliation.