The White House on Sunday unveiled a set of immigration priorities that it wants incorporated into any congressional deal to protect the roughly 700,000 “Dreamers” who could be affected by the president’s decision to rescind the Deferred Action for Childhood Arrivals program.

Unfortunately, the president’s proposals — which include stepped-up border enforcement, increased deportations, and a crackdown on employers who hire illegal aliens – will only exacerbate the real problem underlying our immigration debates: The economy’s demand for labor exceeds the current supply of legal migrants. An enforcement regime that reduces the number of undocumented workers in the U.S. without also expanding the number of guest workers will almost certainly lead to falling production and rising prices in agriculture, construction, landscaping, and other industries that depend on such workers.