Pfc. Bradley Manning will continue to face a charge that he aided the enemy by releasing reams of classified information onto the Internet.
Military judge Col. Denise Lind denied a defense lawyers' request to dismiss the charge on Thursday, as well as another charge for computer fraud. Manning's trial began at Fort Meade, Md. in early June and may continue as long as late August.
The charge for aiding the enemy is among the most serious of the 21 against Manning, who faces life in prison without the possibility of parole if found guilty on the various charges.
Lind says the prosecution has enough evidence to proceed with the case. She is still considering other motions from Manning's defense on counts of theft.
Manning could spend as many as 20 years in jail for the other lesser charges to which he has already plead guilty.
The young private was serving as an intelligence analyst at Forward Operating Base Hammer outside Baghdad from 2009 to 2010. He was arrested there in May 2010 under suspicion of mining classified information on his work computer and personal laptop, and releasing it to anti-privacy website Wikileaks.
Defense attorneys, led by David Coombs, have tried to present their client as a shy and misguided soldier who was disturbed by secretive U.S. violence against civilians in a war zone. Prosecutors have responded by trying to link Manning with Osama bin Laden, who they claim specifically requested information Manning released.