Just weeks after she started preparing opposition research files on Donald Trump's campaign chairman Paul Manafort last spring, Democratic National Committee consultant Alexandra Chalupa got an alarming message when she logged into her personal Yahoo email account.
"Important action required," read a pop-up box from a Yahoo security team that is informally known as "the Paranoids." "We strongly suspect that your account has been the target of state-sponsored actors."
Chalupa -- who had been drafting memos and writing emails about Manafort's connection to pro-Russian political leaders in Ukraine -- quickly alerted top DNC officials. "Since I started digging into Manafort, these messages have been a daily occurrence on my Yahoo account despite changing my password often," she wrote in a May 3 email to Luis Miranda, the DNC's communications director, which included an attached screengrab of the image of the Yahoo security warning. read more