Princeton professor and retired Marine Colonel Walter Murphy has been described as one of the “the most distinguished constitutional scholars of the 20th century.” Murphy recently learned his name appears on the government's no-fly list -- perhaps because he has criticized the Bush administration for abusing the constitution. [includes rush transcript]

Our next guest has been described as one of the “the most distinguished constitutional scholars of the 20th century.” His name is Walter Murphy. He is a professor emeritus at Princeton and the author of many books. He is also a retired Marine Colonel.

Earlier this week he wrote a widely read internet column on how he recently learned his name appears on the government's no-fly list -- perhaps because he has criticized the Bush administration for abusing the constitution. Walter Murphy joins us on the line from his home in Albuquerque, New Mexico.

• Walter Murphy. Constitutional law scholar and professor emeritus of politics at Princeton University. He is author of numerous books, including “Constitutional Democracy: Creating and Maintaining a Just Political Order.” Princeton describes him as “among the most distinguished constitutional scholars of the 20th century.”