Postmaster General Louis DeJoy acknowledged in an internal memo this week that his restructuring plans for the United States Postal Service, which have garnered severe criticism from Democrats, have had “unintended consequences.”

While the changes were necessary, they “impacted our overall service levels,” DeJoy said in the memo that was obtained by CNN.

“However, recent changes are not the only contributing factors,” DeJoy write. “Over the years we have grown undisciplined in our mail and package processing schedules, causing an increase in delayed mail between processing facilities and delivery units.”

DeJoy, a big GOP donor who assumed the role of postmaster general in June, announced at the beginning of the month sweeping organizational changes that saw nearly two dozen postal executives get reassigned or displaced, including the pair of officials in charge of day-to-day operations.

The reduced service capacity of the nation’s mail service has been put in the spotlight recently as the tensions surrounding November’s general elections have increased. Since the onset of the coronavirus pandemic, Democratic lawmakers at all levels have pushed for expanded mail-in voting.

Some states such as Oregon and Washington already have robust mail-in voting systems, but many other states require residents to be over a certain age or have a verifiable excuse to vote absentee.