For nearly three decades, 'South Park' has held a mirror to American culture, and its 29th season opener suggests that mirror is now angled squarely at the Oval Office. By renaming itself 'South America' in mock tribute to executive orders reshaping the nation's geographic vocabulary, creators Trey Parker and Matt Stone are doing what satirists have always done — using absurdity to interrogate power. Whether this represents artistic conviction or comedic narrowing is a question the culture is now openly asking.