On Friday's broadcast of MSNBC's "MTP Daily," 2020 presidential candidate, former HUD Secretary, and former San Antonio Mayor Julián Castro (D) discussed his immigration plan and said that he isn't sure he would keep all of the current fencing on the border, and that "To the extent, for instance, that some of that fencing goes over environmentally sensitive areas, I would be open to reviewing that. Most of that fencing is there, it’s going to stay there."