If China backed a violent overthrow of the Canadian government to install a pro-Chinese leader, and then was working on installing nukes in Canada while selling

If China backed a violent overthrow of the Canadian government to install a pro-Chinese leader, and then was working on installing nukes in Canada while selling them weapons, what do you think the US would do? John Mearsheimer is one of the few voices trying to shield us from the risk of a nuclear war that the arms and energy industries are happy to encourage for their own bottom lines. You are being fed propaganda, but it's not from John Mearsheimer.