In the United States, one prominent example of protectionist policies is the imposition of tariffs on imported steel and aluminum.In 2018, the Trump administration implemented tariffs of 25% on steel and 10% on aluminum imports, citing national security concerns and the need to protect domestic industries from foreign competition.These tariffs aimed to support U.S. manufacturers by making imported metals more expensive, encouraging consumers and businesses to buy domestically produced materials.This example illustrates the complexities and consequences of protectionist measures.