WASHINGTON – U.S. Senators Martin Heinrich (D-N.M.), Jeff Merkley (D-Ore.), Bernie Sanders (I-Vt.), Edward J. Markey (D-Mass.), Elizabeth Warren (D-Mass.), Cory Booker (D-N.J.), Sheldon Whitehouse (D-R.I.), Brian Schatz (D-Hawaii), and Alex Padilla (D-Calif.) sent a letter to President Joe Biden urging him to declare a climate...