Psaki brief: Teacher's Union, Vaccine, Free College, Yellen, Tax 5/3/2021 "I just wanted to give you a chance to respond to the accusations that the American Federation of Teachers, the country’s second largest teacher’s union influenced the CDC guidelines on reopening schools. You had Republican Senator Tom cotton saying that this is evidence of a politicized public health agency answering at the beck and call of the teacher’s union. So how does the White House respond?"