Boys camp or the dam
Setting the corruption issue aside, which would have actually been better for Mr. Smith's state, the boys camp or the dam? Consider the number of people impacted, the number of jobs created, and the lasting economic benefits.
If Mr. Smith really wanted to do what was best for his state, then he should have supported the dam, and tackled the Taylor political machine in another way at a later time. As it so happened, he really lucked out on the caving of Senator Paine.