Watch former Obama adviser Antony Blinken’s candid, full interview on Putin and allegations of Russian interference in the 2016 U.S. election –all part of "The Putin Files", FRONTLINE's media transparency project. Explore Blinken's full interview and interactive transcript here:https://www.pbs.org/wgbh/frontline/in...

Explore the entire "Putin File" experience here: http://www.pbs.org/wgbh/frontline/int...