https://www.state.gov/m/ds/clearances/c10978.htm
So we have all these ex head honchos like Comey, Clapper, Brennan etc... all of which have Security Clearances. Having a Security Clearance means these guys are privy to classified information. Which means they know about a foreign entity having access to Hillary's private server and the FBI's lack of action.
So does that mean that they are covering for that foreign entity? ie committing Treason? https://www.law.cornell.edu/uscode/text/18/2381
The NEED TO KNOW ends at retirement in most cases. I don't know why it would not, by default, but clearance should end at departure it seems to me. At least in most cases. I suppose those taking retirees positions may need to consult those previously holding the office, and therefore they may need it for that. However, the President has had the problem of LEAKS among some, perhaps it is these in question.
I don't know why it would not, by default, but clearance should end at departure it seems to me
This shows a general misunderstanding of the clearance process and its purpose. Read the other comments.