Former Mexican President Vicente Fox said the U.S. is facing “decay” and called President Trump a “spoiled child” after the president said he’s no longer willing to deal on granting permanent legal status to illegal immigrants under the Obama-era DACA program. Mr. Fox, who as president of his country from 2000 to 2006 oversaw a massive exodus of people to the U.S., praised the DACA program that protects hundreds of thousands of them from deportation. “Acting like a spoiled child, won’t get you anywhere in politics!” Mr. Fox said via Twitter. “DACA is not only a program, it’s a way...