Trump made the tweet four days after openly admitting to withholding funds from the USPS in order to prevent mail-in voting. Trump also selected Louis DeJoy as Postmaster General, who has been accused of conflicts of interest and working to degrade the USPS’ operations.
CBS17 – ‘SAVE THE POST OFFICE!,’ tweets President Trump amid recent USPS controversy
Politico – Voters sue Postal Service and Trump over changes ahead of election