President Donald Trump was mocked Monday by hundreds of protesters outside a farmers convention in New Orleans with a twist on a chant he has heard many times: “Lock him up!”

Protesters chant “Lock him up” right outside the New Orleans Convention Center, where @realDonaldTrump is speaking today. pic.twitter.com/d5W1N64Gpa

And the walk to the Convention Center, where Trump is speaking, is beginning pic.twitter.com/RWCVLsespE

It’s not clear which particular Trump activity the protesters were targeting in the chant that has been directed at Hillary Clinton by Trump supporters, in the presidential campaign and afterward.

Just one of the many homemade posters out here today: pic.twitter.com/95uUqwjA0a

Inside, at the annual convention of the American Farm Bureau Federation, Trump talked up his current trade battles, even though they’re hurting famers.

Trump’s withdrawal from an Asia-Pacific trade agreement means that U.S. farmers are struggling against advantages granted by the new Trans-Pacific Partnership to Canadian and Australian competitors in such markets as Japan. Other countries have also imposed retaliatory tariffs on many American farm products. China, traditionally a major buyer of U.S. soybeans, has turned to other markets.

Trump promised his audience that the trade battles will eventually pay off.

The rural vote helped put Trump over the top in the 2016 election, but farmers aren’t doing so well with him in the White House. Net farm income fell an estimated 12 percent last year, down about 40 percent from its peak in 2013.

“We weather the weather,” farmer Kristin Duncanson, who raises hogs, corn and soybeans in Minnesota, told NPR. “It’s weathering the politics that makes managing our businesses a little tougher than they have been in the past.”