With the ninth veto of his presidency, President Obama struck down a congressional measure that would have overturned federal water regulations. Congressional Republicans tried to use the Congressional Review Act to overturn the Federal Clean Water rule.

The Federal Clean Water rule, which expands the number of U.S. waterways regulated by the federal government, is necessary because it protects waterways and the Supreme Court decisions make it unclear what the agency may regulate under the Clean Water Act according to the EPA. Despite Obama's veto, this fight is far from over:

Court challenges make it unclear whether the rules will become fully implemented. This courtroom battle is just one of several major water fights expected in 2016. That’s because agricultural interests out West are fighting federal enforcement of existing regulations as well as the implementation of new rules, Capital Press reported.

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