The Postal Service’s plans will delay a third of mail in 27 states, according to a Washington Post analysis, hitting states west of the Rocky Mountains especially hard.

Founded in 1920, the NBER is a private, non-profit, non-partisan organization dedicated to conducting economic research and to disseminating research findings among academics, public policy makers, and business professionals.

The delivery giant’s performance lags behind UPS, data show, as a pandemic-fueled e-commerce surge overwhelms its network.