The leaks suggest to our NATO allies that the U.S. military isn't seriously engaged in the operation.
Leaks suggest that the US isn't engaged in the operation, but the US has plans for the bad guys. 
mnli hypothesis: Leaks suggest that the US isn't engaged in the operation, but the US has plans for the bad guys.  premise: The leaks suggest to our NATO allies that the U.S. military isn't seriously engaged in the operation.