The public unveiling of the Biden administration’s lawfare campaign against a past president and political rival came on Aug. 8, 2022, the day the FBI descended on Donald Trump’s Mar-a-Lago residence in search of classified documents. It was a shocking moment, the first time in history federal law-enforcement had acted against a former president. More shocking: It didn’t have to be that way. The Justice Department insisted on it. That’s the disturbing information contained in emails released this week by the Senate Judiciary Committee. In missives spanning the summer of 2022, FBI officials expressed alarm and forcefully pushed back against...