Two scandals broke last night with Rep. Rick Renzi (R-AZ) at their centers. At first glance they have nothing in common. But a closer look reveals the deals now under federal scrutiny pivot on two central issues: Arizona’s fragile but important San Pedro River, and Renzi’s remarkable ability to aid his supporters by manipulating the waterway’s health.

In a nutshell: Renzi cut one deal in 2003 that helped take water out of the San Pedro River, financially benefiting a major political backer but potentially devastating to the waterway, which is said to be vital for millions of migratory birds. The congressman made a second deal deal in 2005 ostensibly put water back into the river — and made millions for another major political supporter and onetime business partner. Both are now reportedly under federal scrutiny.

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