Meeting President Tsai Ing-wen of Taiwan on Wednesday, House Speaker Kevin McCarthy (R-CA) rightly pledged continued American support for Taiwan. Unfortunately, McCarthy missed an important opportunity to push Tsai on the need for much-increased defense spending. China's fury over this meeting be damned, McCarthy made a good move hosting Tsai at the Ronald Reagan presidential library. The leader of a nation facing annihilation, at least in terms of its national democracy, Tsai has shown political courage in staring down escalating threats from Beijing. But while Republicans in Congress are rightly pushing for increases in military aid to Taiwan, McCarthy should...