A neighbor of Ryan Routh, the reported person of interest detained by authorities in the attempted assassination of former President Donald Trump, told a local news station in North Carolina that the man was “a little cuckoo” and owned a lot of guns—but still expressed disbelief that he would do anything violent. “I mean I didn’t think he would go that far. I knew he was a little cuckoo, but assassinating the president? I mean he’s going to be going away for a long time,” an anonymous former neighbor in Greensboro, North Carolina told local station Fox 8. “I just...