John Dickerson

John Dickerson is a CBS senior national correspondent and Chief Political Analyst. He is also a Contributing Writer to The Atlantic and is co-host of the Slate Political Gabfest.

CBS Sunday Morning: Russia’s invasion of Ukraine is a test for America

The CBS News correspondent says standing up to Putin's lawless violation of another country's sovereignty – an attack on the values of self-determination and freedom – is a test of American ideals and morals.