No and he will probably never win a slam
Don't agree. I think he will definitely win a slam when the current generation + Roger start slowing down.
I think the next 2 to 3 years we will have the top 4 and maybe one of the 2nd tier guys like Tsonga, Berdych and Del Porto winning the slams. But from the current younger generation Raonic is definitely the one with the better chance at slams.
As for the OP, the probability of Raonic winning the US Open is < 1% imo.