States that voted for Donald Trump for president are also the ones challenging a rule clarifying which waters and wetlands fall under the jurisdiction of the Clean Water Act, a Bloomberg BNA analysis revealed.

What’s more, business, manufacturing and agricultural groups such as the U.S. Chamber of Commerce and the American Farm Bureau Federation that oppose the Clean Water Rule (RIN:2040-AF30) have sued in federal courts located in the same “red” states that challenged the rule and are considered to have a conservative bent, a Bloomberg BNA analysis of legal challenges filed in federal appeals and district courts reveal.

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“It is a perfectly genuine legal question,” Deborah Sivas, Stanford Law School professor who is involved in challenging the rule on behalf of the Puget Sound Waterkeeper in both the Western District of Washington as well as in the Sixth Circuit, where the group’s petition, originally filed in the Ninth Circuit, was consolidated with dozens of others.