https://apnews.com/987af9f977098906f5d71b9ef325b85f > BEIJING (AP) — The U.S. government has stepped up a feud with Beijing over security by adding China’s biggest processor chip maker and a state-owned oil giant to a blacklist that limits access to American technology and investment. > Thursday's announcement adds to steps taken by President Donald Trump against China since losing his re-election bid Nov. 3. Political analysts have said Trump was likely to take further action before President-elect Joe Biden takes office Jan. 20.