The president said only immediate families of the victims of the mass shooting in 2009 would witness the execution of Maj. Nidal Malik Hasan.

© Doug Mills/The New York Times

Republicans joined Democrats in calling on the Pentagon’s inspector general to look into whether the Trump administration was responsible for the interruption.

© Tyler Hicks/The New York Times

A retired general, a Catholic archbishop for the military and one of Maj. Nidal Malik Hasan’s victims were among those who had spoken out.

© Nicole Bengiveno/The New York Times

The president said only immediate families of the victims of the mass shooting in 2009 would witness the execution of Maj. Nidal Malik Hasan.

© Doug Mills/The New York Times

The president said only immediate families of the victims of the mass shooting in 2009 would witness the execution of Maj. Nidal Malik Hasan.