John Brennan has the right to attack Trump, say ex-intelligence chiefs

It is quite something when a distinguished bunch of former CIA directors get together to condemn the US president. Bob Gates and Leon Panetta, both CIA directors in their respective careers as public servants, are two of a dozen former spy chiefs who have given their support to John Brennan, CIA director under Obama, whose security clearance has been revoked by Trump for publicly criticising the president's leadership.While not necessarily agreeing with everything Brennan has said they insisted he was in his rights to speak out. Freedom of speech is a basic tenet of the US constitution. These excellent public servants who have worked under different presidents, Republican and Democrat, have come out of retirement to voice their concern. Will this make Trump change his mind? No, because he will see it as further evidence of a conspiracy against him. The more people who criticise him, the more determined he will be to ignore the attacks. I truly think Trump is building up to sack Robert Mueller and his whole team to stop them investigating the allegation that his campaign colluded with Moscow to win him the White House. Brennan, the most outspoken of any CIA director in recent memory, has described Trump's claim that it is all a witchhunt and fake news as "hogwash". I have asked this before. Does Brennan know more about this alleged collusion than Mueller? If so, why doesn't he reveal it? For if there is concrete evidence then it would be a federal criminal offence and put the alleged crime on a level above and beyond the Watergate burglary of the Democratic National Committee HQ in the 1970s. It would be a monster crime which would lead to the downfall of Donald Trump.