The Supreme Court began oral arguments in a case on Monday that pits the Navajo Nation against the Biden administration, along with four Southwest states, over the tribe\u2019s rights to the Colorado River, the West\u2019s most important waterway. POLITICO\u2019s Annie Snider breaks down the arguments and what\u2019s at stake. Plus, a federal judge blocks President Joe Biden\u2019s WOTUS rule in Texas and Idaho.