As America begins the formidable task of getting our kids back to school and all of us back to work safely ... public health experts face two opponents: covid-19, but also political leaders and others attempting to undermine the Centers for Disease Control and Prevention. As of this date, the CDC guidelines, which were designed to protect children, teachers, school staffers and their families - no matter the state and no matter the politics - have not been altered. It is not unusual for CDC guidelines to be changed or amended during a clearance process that moves through multiple agencies and the White House. But it is extraordinary for guidelines to be undermined after their release. Through last week, and into Monday, the [Trump] administration continued to cast public doubt on the agency's recommendations and role in informing and guiding the nation's pandemic response. On Sunday, Education Secretary Betsy DeVos characterized the CDC guidelines as an impediment to reopening schools quickly rather than what they are: the path to doing so safely. The only valid reason to change released guidelines is new information and new science - not politics. Sound science is being challenged with partisan potshots, sowing confusion and mistrust. These efforts have even fueled a backlash against public health officials: Public servants have been harassed, threatened and forced to resign when we need them most.