Bill Richardson told ABC's "This Week" he is "optimistic" Russia will agree to free the WNBA star alongside former Marine Paul Whelan.
But Russia strongly warned Washington against publicizing the issue.
The "Daily Show" host calls out Russia's latest strong-arm tactics.
WNBA star Brittney Griner has been sentenced to 9 years in prison in a Russian court for drug smuggling.
The Missouri Republican opposed allowing Finland and Sweden into the trans-Atlantic alliance in the wake of Russia's aggression.
The WNBA star and two-time Olympic gold medalist faced up to a decade behind bars.
Nikopol, a city close to the country’s biggest nuclear power plant, sustained a barrage of shelling amid Russian attacks in several regions.
Alina Maratovna Kabaeva, an Olympic medalist and former State Duma member, has a "close relationship to Putin," the U.S. Treasury Department said.
American basketball star Brittney Griner is back in court for her trial for cannabis possession amid U.S. diplomatic efforts to secure her release.
Russian officials have said no release of Griner could occur until the judicial process is completed.