President Trump has long celebrated William McKinley's tariff policies. Vintage photos show how they affected Americans.

William McKinley was a largely forgotten American president until Donald Trump returned to the White House as his biggest fan, due to McKinley’s own love affair with tariffs.

An undated photo of William McKinley, 25th president of the United States. He was inaugurated in 1897, and again in 1901 just prior to being assassinated on Sept. 6, 1901. Donald Trump ...