During a visit to the Caribbean on Wednesday, Secretary of State Marco Rubio was asked about recent talks in Geneva regarding weapons of mass destruction and the prospect of future nuclear weapons agreements. He responded that any such deal would have to involve Russia and China, specifically the latter, given the country’s weapons capacity and buildup.

“Well, we think ultimately, in the 21st century, for there to be a true arms control agreement, it has to involve China,” Rubio said. “Their stockpiles have increased dramatically.”