This is not a true statement.
https://en.wikipedia.org/wiki/History_of_tariffs_in_the_United_States
"The United States pursued a protectionist policy from the beginning of the 19th century until the middle of the 20th century. Between 1861 and 1933, they had one of the highest average tariff rates on manufactured imports in the world. After 1942, the U.S. began to promote worldwide free trade. After the 2016 presidential election, the US increased trade protectionism.[2]"
"According to Dartmouth economist Douglas Irwin, tariffs have served three primary purposes: "to raise revenue for the government, to restrict imports and protect domestic producers from foreign competition, and to reach reciprocity agreements that reduce trade barriers."[3] From 1790 to 1860, average tariffs increased from 20 percent to 60 percent before declining again to 20 percent.[3] From 1861 to 1933, which Irwin characterizes as the "restriction period", the average tariffs increased to 50 percent and remained at that level for several decades. From 1934 onwards, which Irwin characterizes as the "reciprocity period", the average tariff declined substantially until it leveled off at 5 percent.[3]"
"Tariffs were the greatest (approaching 95% at times) source of federal revenue until the federal income tax began after 1913. For well over a century the federal government was largely financed by tariffs averaging about 20% on foreign imports. At the end of the American Civil War in 1865 about 63% of Federal income was generated by the excise taxes, more than twice the 25.4% generated by tariffs. In 1915 during World War I, tariffs generated 30.1% of revenues. Since 1935, tariff income has continued to be a declining percentage of Federal tax income."
