The FBI’s counterintelligence investigation of Trump is far from the first time that the FBI has monitored, surveilled and investigated U.S. elected officials who the agency had decided harboerd suspect loyalties and were harming national security. The FBI specialized in such conduct for decades under J. Edgar Hoover, who ran the agency for 48 years and whose name the agency’s Washington headquarters continues to feature in its name.
Perhaps the most notable case was the Hoover-led FBI’s lengthy counterintelligence investigation of the progressive Henry Wallace, both when he served in multiple cabinet positions in the Franklin Roosevelt administration and then as FDR’s elected Vice President. The FBI long suspected that Wallace harbored allegiances to the Kremlin and used his government positions to undermine what the FBI determined were “U.S. interests” for the benefit of Moscow and, as a result, subjected Wallace to extensive investigation and surveillance.