This morning President Obama will deliver what the White House is calling a major national security speech. At least part of his speech will detail his plan to close the Guantanamo Bay Detention Center. But with Congressman, Senators and even FBI Director Robert Mueller lining up against the closure of Guantanamo, what can Obama possibly say? The Takeaway talks to Jonathan Mahler. He’s a contributing writer for the New York Times Magazine and author of the book The Challenge: Hamdan v. Rumsfeld and the Fight over Presidential Power.