This NPR News Now episode covers the Trump administration's rollback of vehicle fuel economy standards, a New York prosecutor's reopened investigation into gang rape allegations at a Cornell fraternity, and Texas AG Ken Paxton's comments on balancing border security with immigrant labor needs. The broadcast also reports on US stocks falling from record highs and Democrats campaigning in South Carolina ahead of the 2028 primary cycle. Additionally, it features a segment on the emerging field of "smoke ecology" studying how wildfire smoke affects bird behavior, and notes that MLB games have l…