Alito on subjects ranging from the death penalty to the right to die, later telling reporters "I continue to be worried -- and I pressed the questions again today, as I have all week long,...He is not clear that he would serve to protect America's fundamental rights." Senator Kennedy began his questioning of Alito by asking him about his comment that "The concept of a unitary executive does not have to do with the scope of executive power," asserting that this comment was contradictory to others made by Alito. Kennedy again questioned Alito on his recusal list as a member of the Third Circuit Court of Appeals with regard to the Vanguard case. There is some dispute as to when the Vanguard companies were added to Alito's recusal list. Kennedy went on to say "[Alito] has failed to give us any plausible explanation." Senator Joe Biden (D) initiated his allotted 20 minutes of questioning by asking Alito if the president has the authority to "invade Iran tomorrow without getting permission from the people, from the United States Congress, absent him being able to show there's an immediate threat to our national security?" Alito responded to Senator Biden's questioning with "... what I can tell you is that I have not studied these authorities and it is not my practice to just express an opinion on a constitutional question including particularly one that is as momentous as this." Senator Herb Kohl (D) asked Alito, "Do you think that the courts need to consider public opinion when deciding cases?"—to which Alito responded, "I think that the courts were structured the way they are so that they would not decide their cases based on public opinion." Kohl went on to ask, "Should judges be term-limited? Should judges, at least, be age-limited?" Alito responded, "I didn't think we should look to foreign law in interpreting our Constitution, [but] I don't see a problem in looking to the practices of foreign countries in the way they organize their constitutional courts." When asked how he differs from Justice Sandra Day O'Connor, Alito said, "I would try to emulate her dedication and her integrity and her dedication to the case-by-case process of adjudication, which is what I think the Supreme Court and the other federal courts should carry out. I think that is a central feature of best traditions of our judicial system." Senator Dianne Feinstein (D)