It's not like Trump's 'whispering this to Theresa May,' laments a former CIA chief

PO1 William "Chip" Nagel - The problem is that President Trump shared ORCON (classified originator controlled declassification and disclosure) material collected by and belonging to an allied foreign government intelligence organization. President Trump was obligated by treaty to request and obtain advance permission to share this information with the Russians. Warmest Regards, Sandy :)
See Intel Community Policy Guidance 710.1 - Application of Dissemination Controls: ORCON
https://fas.org/irp/dni/icd/icpg710-1.pdf

I'll accept the facts from those that were at the meeting and here first hand knowledge, not a former employee that is interpreting maybe one or two words from a conversation... that may or may not have been true.