MSNBC’s Tamron Hall drew cheers and jeers Tuesday afternoon after she pressed billionaire businessman Donald Trump to explain how he plans to build a wall on the southern border and make Mexico pay for it.

“Earlier in the year … you released your immigration plan. A five-point plan. We have not heard much more since then. So let’s go by the numbers. We talked a lot about building the wall, the very big wall. How much will the wall cost?” she asked.