Sen. Rob Portman (R-Ohio) on Sunday questioned why the U.S. rejected Poland’s proposal to transfer MiG-29 fighter jets to a U.S. air base in Germany, saying “I don’t understand why we’re not doing it.” Asked by co-anchor Dana Bash on CNN’s “State of the Union” if he is worried that Poland giving planes to Ukraine could trigger World War III, Portman said “I don't know why that would be true.”