Tony has already lost most of his organization - Christopher; Silvio (and who could replace him as consigliere), Bobby. He's got Paulie and a few others whose names I never even learned. I hope he makes Phil swim with the fishes though.
I dont believe he has Paulie on his side. I feel Paulie is playing both sides of the fence. Remember when he met with Phil last season and didnt want Tony to know? Then, when nobody went to his "mothers" funeral, he felt very snubbed.
And when the Fed warned Tony, he specifically said "our snitch told us it's already in the works...". So, the FBI must have someone on the inside feeding them info. Dont know on which side though.