FILE - Mailed in ballots sit in US Postal Service bins inside the office of the Stanislaus County Clerk on November 6, 2018 in Modesto, California.
Stanislaus County is in California's 10th Congressional District which is host to a close race for US (Photo by Alex Edelman/Getty Images)WASHINGTON - The U.S.
Postal Service has sent letters to 46 states and the District of Columbia, warning it cannot guarantee all ballots cast by mail for the November election will arrive in time to be counted, The Washington Post reported Friday.The Postal Service is bracing for an unprecedented number of mail-in ballots as a result of the coronavirus pandemic.