The Washington Post recently published a summary of classified information about Russian attempts to influence our presidential election (https://www.washingtonpost.com/world/national-security/obama-orders-revi...).
Given that the actual election of the president, by the electoral college, has not yet happened, and that it is precisely the job of the electoral college to guard us against exactly this sort of influence, it is vital for the 538 members of the electoral college to have full information about these events.
The President should make available all information about these events to all members of the electoral college, in whatever manner he deems best.