LAS VEGAS, New Mexico — Firefighters slowed the advance of the largest wildfire in the U.S. as heavy winds relented Wednesday, while President Joe Biden approved a disaster declaration that brings new financial resources to remote stretches of New Mexico devastated by fire since early April. U.S. Rep. Teresa Leger Fernandez announced the presidential disaster declaration during an evening briefing by the U.S. Forest Service about efforts to contain the sprawling wildfire in northeastern New Mexico, which has fanned out across 250 square miles of high alpine forest and grasslands at the southern tip of the Rocky Mountains. …An estimated 15,500 homes in outlying areas and in the valleys of the Sangre de Cristo Mountains that border Las Vegas have been affected by mandatory evacuations. The tally of homes destroyed by the fire stands around 170.