Horowitz testified his access to evidence was limited. Limited to government phones, limited to government emails, limited to the FBI/DOJ, and limited to those still currently in the government. Think of how many high level officials were out of government when he was investigating. Zero subpoena power there. Horowitz couldn’t investigate the CIA, and according to Brennan he kick started the whole thing.
“I wanted to make sure that every information and bit of intelligence that we had was shared with the bureau [FBI] so that they could take it. It was well beyond my mandate as director of CIA to follow on any of those leads that involved U.S. persons. But I made sure that anything that was involving U.S. persons, including anything involving the individuals involved in the Trump campaign, was shared with the bureau.”
Do you now see Horowitz limitations to evidence?