Sen. Marco Rubio is calling out Apple for considering a purchase of phone memory chips from a Chinese state-owned supplier that he says would be disastrous for American tech leadership and national security. The Florida Republican warned Apple CEO Tim Cook in a letter Thursday against striking a deal with Chinese chip manufacturer Yangtze Memory, which is funded by the Chinese Communist Party and has extensive links to the Chinese military, the People’s Liberation Army. The company plays a key role in China’s broader national strategy of challenging American leadership in economic, military, and tech innovation by building up the...