The Justice Department search of Joe Biden’s vacation home added a new twist to a nearly month-long saga of classified documents that included a special counsel overseeing the investigation. The FBI’s move may reveal how aggressively and thoroughly the Biden team has been reviewing documents stored on Biden’s personal property. Before the latest government raid, Biden’s lawyers had been conducting their own inspections of the president’s private residence without the surveillance of government investigators. While they found classified material at President Wilmington’s home, they said no such documents were found at the president’s beach house. If the FBI finds such material, it will fuel assertions by Mr. Biden’s critics that there is more to the story than the president’s team has revealed. At the very least, the search will help quell some concerns expressed by Republicans that the government has less scrutiny and suspicion of Mr. Biden than Donald Trump, whose Mar-a-Lago estate was raided by the FBI last August. When Mr. Biden’s lawyers first revealed they had found classified material in his home and private office, the former president, House Speaker Kevin McCarthy and other conservatives publicly questioned why the sitting president hadn’t been targeted by government investigators. Now, however, Biden’s defenders point out that multiple of Biden’s properties have been searched, but there is no indication that the FBI investigated Trump’s New Jersey and New York residences.