I'm going to assume you didn't watch the hearing otherwise you'd feel embarrassed making this thread considering the astounding amount of nothing Brennan could mention.
Brennan admitted that It's common for members of any campaign to talk to foreign nationals
Brennan wouldn't deny that there was damaging material about Hillary that hadn't been released yet
Brennan kept stating that Russia hacked the DNC but offered no evidence, while committee members correctly referred to it as alleged
Brennan kept stating that Russia interfered in the election but offered no evidence
Brennan was embarrassed when the Steele 'pissgate' folder was bought up and could do nothing except dodge the question regarding it's authenticity
Committee members who had read the classified information which was not available publicly seemed bemused by Brennans adamant stance that Russia hacked the DNC and Trump colluded with Russia, but could not offer any evidence
etc etc, pretty much Brennan embarrassing himself the whole time.