He was in the process of building a wall but it was one of the first things the Dems shut down along with the xl pipeline and drilling. Look at where we are now.
The Republicans shut down his wall, not the Democrats. The first two years of his presidency we had Republican Senate and House. We had a Republican Senate for his entire presidency. Republicans eaked out funding for it, A few hundred million here, 1 billion or two there, etc. He asked for 18 billion to build the wall and they acted like it was the end of the world. The Republicans stopped his wall. These same Republicans will throw the entire amount he requested for the wall to Israel right now. They have given 15 times that amount to Ukraine in the last two years. The Democrats couldn’t have stopped him if they wanted to. Paul Ryan stopped him. Mitch McConnell stopped him.