"To avoid even the appearance of any impact on election mail," the postmaster general says any further operational changes will be postponed
The 56-year-old is facing charges of 1st-degree assault.
The Minnesota Senate has also canceled hearings because of the frigid wind chills.
President Trump has declared Dec. 5 a national day of mourning.
More than 20 possible victims have been identified since the arrests.
Residents now have to trek to Royalton.