Subplot

NY Times: As Democrats Gather, a Russian Subplot Raises Intrigue By DAVID E. SANGER and NICOLE PERLROTH

Proving the source of a cyberattack is notoriously difficult. But researchers have concluded that the national committee was breached by two Russian intelligence agencies, which were the same attackers behind previous Russian cyberoperations at the White House, the State Department and the Joint Chiefs of Staff last year. And metadata from the released emails suggests that the documents passed through Russian computers.