Resolute Support Commander: We’re in a ‘Stalemate’ in the Afghan War

MCCAIN: "In your overall commander's assessment are we winning or losing?" 
NICHOLSON: "Mr. Chairman, I believe we’re in a stalemate."
(...) 
MCCAIN: "As you know as -- and the committee knows, 8,400 U.S. troops and 5,000 coalition troops, that’s 13,300, and I’m fully aware, General, I know a members are -- that numbers are just one parameter. ... How many more do you need to get this stalemate reversed?" 
NICHOLSON: "Mr. Chairman, I have adequate resourcing in my counterterrorism mission. In my train, advise and assist mission, however, we have a shortfall of a few thousand."