A national poll of 1,711 people, carried out by the University of Quinnipiac between the 19th and the 26th May 2015, reveals that

 64% of US voters think that their country is losing the fight against Daesh,
 17% disagree
 19% have no opinion.

The matgin of error is +/- 2,4%

Républicans Democrats Independents Men Women Total
USA are winning 17 12 28 13 20 15
USA are losing 64 74 50 69 63 64
No opinion 19 14 23 17 16 21
Translation
Pete Kimberley