I thought Grassley was /our guy/?
Pay attention to the reason Grassley wants McCabe to testify. Pic Related
Then look at McCabe's belief Potus is responsible for his firing. So why exactly does Grassley want to investigate the circumstances surrounding his firing?
After reading this letter, I feel there is a lot we don't know about. The FBI won't allow McCabe to hand over documents to Congress. Why? What are they hiding?
Also, highlighted is proof he is seeking total immunity from everything he says.