Vice President Kamala Harris’s disastrous performance in her interview with Fox News’s Bret Baier was notable for two reasons. First, to the degree that there was any discussion of foreign national security threats to America, Harris only mentioned Iran. She failed to mention the disastrous war in Ukraine, where more than a million are dead, and the threat of nuclear war exists. Harris failed to reconcile her administration’s billions in dollars of military and civilian aid to Ukraine and policy actions against Russia for the most significant military threat in Europe since the end of World War Two. Worse though was her failure to make any reference to the existential threat from the Chinese Communist Party (CCP) and the People’s Republic of China (PRC).

Second, her performance in response to salient questions—ones that had the chance to inform American voters—was an amalgamation of incoherence, anger, and deception that revealed a candidate who is uniquely unsuited to be president of the United States. The fact that she is the Democratic candidate and might become president is alarming to America’s friends, as it is welcomed by America’s enemies.

In the interview, she had the opportunity to discuss her analysis of threats to America. While Iran is certainly a regional danger and a threat to the U.S. and its allies in the Gulf, Saudi Arabia, and Israel, it pales in comparison to the existential threat of the CCP. Indeed, Iran and Russia would be far less of a concern if the CCP were not given a free hand to back these aggressor nations. That the PRC is a grave and fundamental threat is revealed by its hyper-aggressive policies against the American people, U.S. allies like Japan and the Philippines, and partners like India and Taiwan.

An example of the CCP’s threatening military posture was put on display when Exercise Joint Sword 2024B launched on October 14, in which People’s Liberation Army (PLA) forces encircled Taiwan to coerce its new leader, President Lai Ching-te, into a posture of subservience to the PRC. Thus far, those coercive attempts have failed. But Joint Sword 2024B revealed three aspects of the growing PRC threat. First, it showed the increasing capabilities of the PRC. Second, it demonstrated the ever-increasing penetrations of Taiwanese air and seaspace in an effort to normalize those violations and mask the actual invasion when it comes. Third, the first participation of the Chinese Coast Guard in the encirclement of Taiwan occurred.

First, with respect to the increased capabilities of the PLA Navy, it should be noted that their first aircraft carrier, Chinese Navy Ship (CNS) Liaoning/CV-16, conducted 90 fixed-wing take-offs and recoveries and 50 more from their embarked helicopters during their operations in the exercise. That is 140 sorties from a PLA Navy aircraft carrier in just one day. By any measure, the PLA Navy’s carrier aviation capabilities are now approaching U.S. Navy aircraft carrier air wing levels in terms of the number of sorties. It is the case that PLAN aircraft have a more limited range and weapons capacity than their U.S. Navy counterparts, due to the Liaoning’s ski-ramp launch, but the fact remains that within just two years, the Liaoning has gone from launching an average of just 30 sorties a day in 2022 to a 140 today. That is a real strategic trendline that presidential candidate Harris demonstrated no awareness or strategy to counter.

Second, regarding PLA incursions into Taiwan’s air and seaspace, exercise Joint Sword 2024B provides another inflection point in the PRC’s dramatic transformation of the military status quo in the cross-strait environment. During the exercise, Taiwan’s Ministry of National Defense reported that it detected a total of 153 PLA aircraft, 14 PLAN ships, and 12 Coast Guard ships operating around Taiwan and that 111 of those aircraft crossed the centerline of the Taiwan Strait and entered Taiwan’s air defense identification zones from the west, southwest, and east. To put that into perspective, from 1954 to 2020, PLA aircraft only crossed the centerline four times. This pattern of PLA air force incursions across the centerline began in earnest in 2022 when the PRC’s Ministry of Foreign Affairs announced that the PRC no longer recognized the centerline—a clear violation of the previous agreements between Beijing, Taipei, and Washington to not forcibly alter the status quo. Yet since then, and now with exercise Joint Sword 2024B, the Biden-Harris administration has made no mention of this hyper-aggressive behavior by Beijing or taken any actions to rectify it.

Third, the Joint Sword 2024B exercise was unique in that it demonstrated the use of non-PLA ships from the Chinese Coast Guard (CCG) in this PLA-led exercise. Taiwan’s Ministry of Defense reported up to 17 CCGs were detected operating in the waters off Taiwan, or as the PRC’s Global Times noted, the “CCG conducted multi-unit, multi-formation, and multi-subject drills around the island of Taiwan, focusing on strengthening the control network around the island.” The implications of these unprecedented actions by the CCG are to demonstrate that the CCP’s strategy to bring Taiwan under its control, either by blockade or an outright invasion, will use the entirety of the PRC’s assets—a whole of government effort. These facts at sea demonstrate that the PRC’s 2019 declaration of a “People’s War” against the United States is not just propaganda but is advancing in tangible ways.

Americans need to understand the scope and scale of the CCP’s grand strategy as evidenced by the PLA Navy and the CCG’s demonstrated actions during exercise Joint Sword 2024B. The evidence is undeniable: the CCP intends for the PRC to become the dominant naval force, not just in Asia but across the globe. This reality comes against the backdrop of a Biden-Harris administration that keeps downsizing the size and capabilities of the U.S. Navy.

So, when Bret Baier asks candidate Harris what America’s number one foreign adversary is and there is no mention of the PRC, Americans know this candidate is not competent to assume the office of the Presidency. Americans need to pay attention because U.S. national security is on a knife’s edge—to the U.S., the CCP is a hyper-aggressive regime that is determined to realize its grand strategic objective of dominance. Yet Harris displays no strategic gravitas. She evinces no evidence of the seriousness of the situation or of an understanding that deterrence of the CCP’s hyper-aggression is on her shoulders—let alone having a plan to address this threat.

Deterrence of the CCP is everything. If it fails, this country will be at war with the PRC. Harris appears oblivious to the demands and requirements of deterrence. Accordingly, before the PRC blockades or invades Taiwan or launches an attack against the Philippines in the South China Sea, Americans must have a president sitting behind the Resolute Desk in the Oval Office who has the knowledge, experience, and courage to prepare our nation for the demands of deterrence of the CCP’s aggression. It must have a president who signals in stark and no uncertain terms to the CCP that their aggression is certain to fail—and so they had better not try it in the first place. A president who not only can talk tough but has the wherewithal to rebuild the U.S. deterrent. The catechism of deterrence is straightforward: weakness invites aggression; strength deters it. Americans must elect a president who understands this catechism and so defends our nation from all threats—most especially from the existential threat of the PRC.

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James E. Fanell and Bradley A. Thayer are authors of Embracing Communist China: America’s Greatest Strategic Failure. The views expressed are their own.