Senator Graham warns Russia will "wind up in the dark" if it continues to carry out "atrocities against the Ukrainian people"

Senator Lindsey Graham has been one of the most persistent and public critics of Russian President Vladimir Putin in Congress.

On Wednesday, Graham introduced a resolution calling for the Senate to support an International Criminal Court investigation into Putin and his alleged regimes, "crimes against humanity and war crimes against the people of Ukraine and others."

He told "CBS Mornings" Putin needs to be held accountable for the destruction and loss of life happening in Ukraine.