Adam Clarke on Daniel 8:26

He shall cause craft to prosper - They subdued as many by their diplomatic skill and political intrigues as they did by the sword.

He shall also stand up against the Prince of princes - Against Christ, for it was by the Roman authority that he was condemned to death and crucified; and their persecutions had nearly destroyed the Christian religion; but the house was founded on a rock.

But he shall be broken without hand - The tide was turned by the invisible hand of God; and thus heathen Rome was overcome, and converted to Christianity.

The vision of the evening and the morning which was told is true - That mentioned in Dan 8:14.

For it shall be for many days - Not less than two thousand three hundred years!