Judge David Tatel sat on the bench of the powerful D.C. Circuit Court of Appeals for nearly three decades. Appointed by Bill Clinton, he became a prominent, liberal-leaning voice in the judiciary, widely considered a top candidate for the Supreme Court had Al Gore won the 2000 election. 

Tatel was known as a brilliant legal mind, whose opinions helped shape laws affecting voting rights, the environment, internet regulations and press freedoms. But he was also known for another reason: he was blind.

David Tatel retired from the bench in January. He joins Diane to discuss his new book, "Vision: A Memoir of Blindness and Justice." In it, he opens up about his experience as a blind judge – and his grave concerns about the Supreme Court.