Democratic presidential candidate Julián Castro spoke to reporters Friday morning after taking his turn on the soapbox at the Iowa State Fair.
He addressed Iowa farmers, and attacked President Trump, calling climate change a "threat to their livelihood."
Castro also criticized Trump's trade war with China, where companies have halted purchases of US agricultural products.
"I also believe that Iowa farmers understand how badly this President has betrayed them. China has now basically stopped buying agricultural products from the United States. The farmers here, soybean farmers and other farmers have lost contracts that may never come back. Because this President has too big of an ego to actually try and figure out how we marshal support for what we want to do with China, instead of just this erratic go-it-alone haphazard trade war," he said.
"He's caused you to lose your livelihood. He's costing you money out of your pocket right now and costing jobs," Castro continued.