U.S. stocks tumbled on Friday, extending their selloff in the wake of dour economic reports and closing the book on a holiday-shortened week fraught with new tariff threats and worries of softening consumer demand.

During Donald Trump's first four years as president, the S&P 500 (SNPINDEX: ^GSPC) soared 67%. Over the next four years with Joe Biden in the White House, the vaunted index jumped 56%. Will President Trump's tariffs cause the S&P 500 to plunge?

U.S. stock indexes are edging lower on a relatively quiet Wall Street. The S&P 500 slipped by 0.2%, a day after setting an all-time high.