Below is the audio of a recent Russian language interview I did with Radio Free Europe/Radio Liberty on the legality of US military intervention against ISIS. The program also includes commentary by foreign policy experts Mikhail Bernstam of the Hoover Institution, Anna Barshefsky, and Daniel Goure. I know we have some readers who understand Russian; the audio may be of interest to you.
During the program, I suggested that the Constitution requires congressional authorization for this type of large-scale military action, and that the president does not already have such authorization under the 2001 Authorization for the Use of Military Force against the perpetrators and abettors of the 9/11 attacks. On the other hand, I believe that his actions do not violate international law.