This afternoon, President Donald J. Trump posted on social media a video of the theme song of the Davy Crockett TV series from 1954–1955 starring Fess Parker. Over the clip, he wrote: “Davy Crockett, obviously a distant relative of Jasmine Crockett, and a very High IQ Frontiersman, would be proud of the legacy that he began long ago, and especially Jasm…