The Army major on trial for the 2009 massacre at Fort Hood told potential jurors he supports the Taliban and Islamic Sharia law.
Maj. Nidal Hasan, 42, is accused of killing 13 people and wounding nearly three dozen at the Texas Army base Nov. 5, 2009.
He reportedly shouted "Allahu Akbar" before opening fire on a crowd of soldiers.
Hasan is serving as his own attorney and questioned several potential jurors Wednesday about their ability to put aside any prejudice concerning his Islamist views.
If convicted, Hasan could be sentenced to death or life without parole.