Russia is going to have a tough time trying to take Kursk back from Ukraine, says CIA deputy director

• David Cohen says the Russians are in for a "difficult fight" if they want to take back Kursk.
• Ukraine caught the Russians off guard when it launched a shock offensive into Kursk on August 6.
• Besides losing territory, Cohen said Putin now has to deal with Ukrainian forces within Russia.

Reclaiming Kursk from the Ukrainians is going to be a "difficult fight" for the Russians, says CIA deputy director David Cohen.