Defending Taiwan from China means reversing three decades of strategic incoherence and waging a cold war on Beijing.resident Biden’s off-script declaration during his recent Tokyo visit that the United States would intervene militarily if China tried to take Taiwan by force represents a major change in U.S. foreign policy, no matter how much Biden’s White House handlers try to spin it as yet another instance of the president merely “misspeaking.” Biden was not misspeaking, he was articulating what the American people, along with the rest of the world, must now understand U.S. policy to be vis-à-vis Taiwan and China. A...