Castro in Iowa

SIOUX CITY — In a visit to Sioux City on Friday evening, former secretary of Housing and Urban Development Julián Castro said the first thing he’d do on Jan. 20, 2021, if he’s elected president, is sign an executive order putting the United States back into the Paris Climate Accord.

“We need to address some of the long-term threats to this country, climate change being No. 1,” he said.