This is part of a broader pattern. Congress is not capable of understanding or controlling what is going on in the rest of the government. They don't have the t

This is part of a broader pattern. Congress is not capable of understanding or controlling what is going on in the rest of the government. They don't have the time or the resources to do more than play whack-a-mole. Many of them lack the personal and political security to attack corruption without losing their seats. The FBI is quite capable of manufacturing a natural-looking scandal to knock down any Senator who tried to reduce its power. They might be able to do such a thing if they stuck together and presented a unified political front, but they are constantly divided, and strong forces are pushing them into chaos.