Senator John Warner sent a letter to Barack Obama this afternoon regarding his comments during last night's debate alleging ammunition and other equipment shortages in Afghanistan. Warner refers to Obama's comments as "a disturbing framework of factual allegations."

According to Jake Tapper's report earlier today, the unnamed captain to whom Obama attributed the account was deployed to Afghanistan in the summer of 2003. Warner was, at the time, chairman of the Senate Armed Services Committee. As such, he explains that he has "a responsibility to establish where in the military chain of command rests the 'accountability' [for the shortfalls], depending of course, on the accuracy of the facts."

Warner informs Obama that he is working with the Chairman of the Joint Chiefs to determine the facts of the incident described in last nights debate, and that he intends to raise the issues next Tuesday when Secretary of the Army Pete Green and General Casey appear before the committee.

Further, he asks Obama to provide the "essential facts of when- the dates- the unit was deployed, to which brigade combat team, or other unit it was assigned, the name and current location of the captain, or other military personnel who shared the alleged facts with you, so that the committee staff can debrief them."

This comes just hours after Reuters reported doubts within the Pentagon as to the veracity of Obama's account.