Kremlin: any talks about Griner swap must be confidential

Read MoreThe Kremlin has reiterated that any discussions about a possible swap involving U.S. basketball star Brittney Griner who is serving a nine-year prison sentence in Russia for drug possession must be strictly confidentialThe Kremlin has reiterated that any discussions about a possible swap involving U.S. basketball star Brittney Griner who is serving a nine-year prison sentence in Russia for drug possession must be strictly confidential