Former Sen. Chuck HagelCharles (Chuck) Timothy HagelFormer US Defense secretary: 'American global leadership now is really nowhere' Meet Trump’s pick to take over for Mattis at Pentagon Juan Williams: Trump is AWOL on our troops MORE (R-Neb.) believes Russia would be willing to work with the United States on persuading Iran to stop developing nuclear weapons.

Hagel, a former member of the Senate Foreign Relations Committee, appeared on MSNBC on Tuesday to discuss the U.S.