President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE said Tuesday that his administration is working with motorcycle manufacturers that want to move operations to the U.S. after Harley-Davidson announced that it plans to shift some of its production overseas.

Now that Harley-Davidson is moving part of its operation out of the U.S., my Administration is working with other Motor Cycle companies who want to move into the U.S. Harley customers are not happy with their move - sales are down 7% in 2017. The U.S. is where the Action is! — Donald J. Trump (@realDonaldTrump) July 3, 2018

Trump has carried on a sort of feud with Harley-Davidson since it announced last week that it plans to shift some of its production abroad to avoid steep retaliatory tariffs on its bikes from Europe. The European tariffs were introduced in response to Trump's own tariffs on steel and aluminum imports.

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The company already produces some of its bikes and parts overseas to avoid tariffs, including in India and Thailand. Still, it has said that all of its motorcycles sold in the U.S. will continue to be made in the U.S.

Wisconsin-based Harley is the latest company that Trump has taken on personally.

Among the other businesses that have drawn personal attacks from the president are Amazon, which Trump claims abuses the U.S. Postal Service, and Boeing, which he accused of charging too much to manufacture a new Air Force One.

A number of American companies have expressed concerns about Trump's tariffs, and have said they could impact their business. General Motors, for example, has warned that retaliatory duties from other countries could force it to cut jobs in the U.S.