As President Donald Trump threatened to shut down the U.S.-Mexico border in recent days, his Department of Homeland Security nearly doubled the number of temporary guest worker visas available this summer. DHS and the Labor Department plan to grant an additional 30,000 H-2B visas this summer on top of the 33,000 H-2B visas they had planned to give out, the agencies confirmed. H-2B visas, granted to...