Trump’s visit comes as Iowa farmers are worried about his tariffs and a trade war with Mexico, China and Canada, the Des Moines Register reported.

The price of soybeans dropped 20 percent since March, when Trump levied his first tariffs on steel and aluminum imports. This led to to retaliatory tariffs from other countries, the newspaper reported.

During his visit, Pence tried to reassure farmers about the trade war.

“When it comes to agriculture, I just want to assure all my friends here in Iowa and all across the region: Under President Trump’s leadership, we’re always going to stand with American farmers,” he said.

Iowa’s 1st District voted for Trump after voting for former President Barack Obama twice.