To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Share Embed Share URL Video File Node URL Embed Code <iframe title="MRC TV video player" width="640" height="360" src="https://www.mrctv.org/embed/52751" allowfullscreen></iframe> In a recent congressional hearing, Sen. John D. Rockefeller IV, said he sometimes refers to John P. Holdren, Obama's science czar, as 'walking on water.'
