A trio of senators on Sunday called for China to apply more pressure on North Korea,  which has recently adopted an increasingly hostile posture toward the United States.

"China does hold the key to this problem," Sen. John McCain (R-Ariz.) said on CBS News's "Face The Nation."

"China can cut off their economy if they want to," McCain said. "Chinese behavior has been very disappointing, whether it be on cyber security, whether it be on confrontation in the South China Sea, or whether their failure to rein in what could be a catastrophic situation."

Sen. Charles E. Schumer (D-N.Y.), who appeared on the same program, said he agreed with McCain. "You know, the Chinese hold a lot of the cards here. They’re by nature cautious, but they're carrying it to an extreme. It’s about time they stepped up to the plate and put a little pressure on this North Korean regime," he said.