They didn’t build a wall, because they supported amnesty.
That’s exactly what Congr. Hunter has said. The Bush Administration supported amnesty and found every way that he could around the Secure Fence Act after he had signed it into law in 2006.
Within 12 months, and with the help of Sen. Kay Bailey-Hutchinson (TX-R), he defunded the border fence with a signature just hours after Christmas 2007.