Carl Quintanilla, Sara Eisen and David Faber discussed the latest headlines out of Russia and Ukraine, after Vladimir Putin lowered the threshold for his country’s use of nuclear weapons. On the earnings front, the desk hit the strong results out of Walmart, which pushed the stock to a new all-time high. Staying with the consumer, Sara Eisen also took a closer look at RFK Jr.’s plans to “make America healthy again,” and broke down which food and snack stocks might be at risk. Squawk on the Street Disclaimer