From Wikipedia:
"Certain models of the Volkswagen Type 2 played a role in a historic episode during the early 1960s, known as the Chicken War. France and West Germany had placed tariffs on imports of U.S. chicken. Diplomacy failed, and in January 1964, two months after taking office, President Johnson imposed a 25% tax (almost ten times the average U.S. tariff) on potato starch, dextrin, brandy, and light trucks. Officially, the tax targeted items imported from Europe as approximating the value of lost American chicken sales to Europe.
In retrospect, audio tapes from the Johnson White House, revealed a quid pro quo unrelated to chicken. In January 1964, President Johnson attempted to convince United Auto Workers' president Walter Reuther not to initiate a strike just before the 1964 election, and to support the president's civil rights platform. Reuther, in turn, wanted Johnson to respond to Volkswagen's increased shipments to the United States.
The Chicken Tax directly curtailed importation of German-built Type 2s in configurations that qualified them as light trucks – that is, commercial vans (panel vans) and pickups. In 1964, U.S. imports of automobile trucks from West Germany declined to a value of $5.7 million – about one-third the value imported in the previous year."
The Chicken Tax is still around. Ford has been importing its Transit Connect vans from Turkey in passenger vehicle configuration to get around the tax, then ripping out the extra seats to put the vans into cargo configuration.