The 2024 U.S. presidential race is on and it looks like a rematch between Joe Biden and Donald Trump is in the making. Analysts say that Biden represents post-WWII U.S. interventionism in global affairs, while Trump is prone to isolationism, believing that the U.S. should not be involved. CGTN's Wang Guan notes that it's a recurrent theme, U.S. partisan politics over the past century being like a pendulum swinging back and forth between isolationism and interventionism.