President Trump on Sunday showed signs of flexibility over building a wall along the US-Mexico border as he talked about a steel barrier instead of his previous demand for a concrete wall, to prevent illegal immigrants from entering America, a politically divisive issue which has forced a shutdown of the US government now entering its third week.

“We have to build the wall or we have to build the barrier. The barrier or the wall can be of steel instead of concrete if that works better,” he said before leaving for the presidential resort in Camp David. Trump said he intends to call the head of US Steel and a couple of other steel companies to have them come up with a plate or a design for the physical barrier along the US-Mexico border. “We’ll use that as our barrier,” he said.