The poll, conducted on Sunday among 991 US adults, revealed that 35% of those polled said they expected the Saturday incursion to worsen the situation in Venezuela, versus 34% who said it would improve.
A further 9% of those sampled said it would neither improve nor worsen, while 22% said they were not sure.
Fifty-four percent of Democrats believe that the US operation in Venezuela will worsen the situation there, while only 13% of Republicans think the same thing. Sixty-six percent of Republicans think it will get better.