[...] With respect to the alleged interference by Russia and WikiLeaks in the U.S. election, it is a major mystery why U.S. intelligence feels it must rely on "circumstantial evidence," when it has NSA's vacuum cleaner sucking up hard evidence galore. What we know of NSA's capabilities shows that the email disclosures were from leaking, not hacking.
Here's the difference:
Hack: When someone in a remote location electronically penetrates operating systems, firewalls or other cyber-protection systems and then extracts data. Our own considerable experience, plus the rich detail revealed by Edward Snowden, persuades us that, with NSA's formidable trace capability, it can identify both sender and recipient of any and all data crossing the network.
Leak: When someone physically takes data out of an organization — on a thumb drive, for example — and gives it to someone else, as Edward Snowden and Chelsea Manning did. Leaking is the only way such data can be copied and removed with no electronic trace.
Because NSA can trace exactly where and how any "hacked" emails from the Democratic National Committee or other servers were routed through the network, it is puzzling why NSA cannot produce hard evidence implicating the Russian government and WikiLeaks. Unless we are dealing with a leak from an insider, not a hack, as other reporting suggests. From a technical perspective alone, we are convinced that this is what happened. [...]