This timely malaphor is a mash up of several phrases, idioms, and ideas. Certainly “stick one’s head in the sand” (refuse to think about an unpleasant event) and “bury one’s head in the sand” (to ignore or hide from obvious signs of danger) is in the mix, along with “draw a line in the sand” (create an artificial boundary and imply that crossing it will cause trouble). In addition, “dig your heels in” (refuse to alter a course of action) is in play, considering context. Sticking your feet in cement also comes to mind. This mix-up was spoken by Steve Scalise (R-LA) at a press conference on Capitol Hill. Mr. Scalise was referring to Harry Reid and the Senate Democrats, indicating that they would not negotiate. You can find this beauty at about 1:30 in the video below:
Thanks to Susan Kestner for sending this current and timely malaphor in!