WASHINGTON—Apple’s aggressive lobbying campaign to alleviate rising costs by using Chinese memory chips is colliding with an equally strong push by major supplier Micron Technology to block the move, putting President Trump in the middle of a clash between two of America’s biggest companies.President Trump and Apple CEO Tim Cook during the president’s state visit to China in May.In recent weeks, Apple Chief Executive Tim Cook and top executives have pitched Trump and officials including Commerce Secretary Howard Lutnick and Treasury Secretary Scott Bessent on a plan to use memory chips from China’s ChangXin Memory Technologies and Yangtze Memory Technologies…