US Senator John McCain slammed China on Thursday for “bullying” South Korea for its decision to host the US THAAD missile defense system aimed at defending against North Korea, urging Beijing to use its “considerable influence” to rein in Pyongyang. McCain, chairman of the Senate Foreign Relations Committee, also said that Chinese bullying of the Asian ally is “unacceptable” and said he hopes the incoming administration of Donald Trump ensures US security commitments.