They already colluded back in 2016. This CNN report is from after our last general election. No reason to believe they wont do it again
"Washington (CNN) A government investigation concluded that the United States Postal Service "improperly coordinated" with a postal workers union that supported Hillary Clinton's campaign.
The investigation, as documented in a report from the Office of Special Counsel, said the USPS granted employees union leave time off, at the request of the union, to do political activity -- which OSC concluded was a "systematic violation" of a law regarding the political activity of federal employees...."
Report: USPS improperly enabled workers who helped Clinton campaign - CNNPolitics