Walsh explains why he signed Grover Norquist's tax pledge. Note Walsh is on a first name basis with the Progressives in the audience. They're really a part of Walsh's show. They make Town Hall work. Walsh does a lot of this give and take with the audience, and I told him afterwards I had never seen a politican do this before. Walsh said it was probably the school teacher in him. I told him he needed these #occupy folks to make it work, which got a laugh out of him.