His argument is completely irrational. On one hand, he's sticking to the "threatens to their sole source of water" frivolous concern, notwithstanding:
1) that this lake is really just a wide spot in the missouri river, and anywhere upstream the pipeline may cross (any many already do) presents a nearly identical risk (he may not know how rivers work), and
2) the absurdity that is the notion that a pipeline presents abnormal and unseasonable risk of spill, which is patently innacurate.
Because these arguments are so demonstrably weak and incoherent he's resorted to the rather insane position that Dakota wants to build the pipeline here to "get" the indians. As if Dakota desires to waste its resources so it can to stick it to the indians. It's rough ridin' crazy.
The agenda needs no subterfuge, just say you hate oil and gas development and be done with it. Just more illogical partisan bullshit from mir