A lot of folks on Twitter this past week were saying exact same thing you experienced, and the person that I shared last bread.
Some people were even saying they are registered Democrat in Cali, but they vote Republican. Maybe because of party being mentioned on the envelope as you stated.
This is ridiculous, and so unfair. I hope they can put an end to this mess.
Broward arm of big police union drops Wasserman Schultz, endorses Republican
http://www.sun-sentinel.com/news/politics/fl-sb-police-union-endorsements-wasserman-schultz-20180605-story.html
The Fraternal Order of Police district that includes Broward County has dropped U.S. Rep. Debbie Wasserman Schultz, D-Weston, from its endorsements.
Instead, the big police union said it’s endorsing Carlos Reyes, one of three Republicans seeking his party’s nomination to challenge Wasserman Schultz in the Broward/Miami-Dade County 23rd Congressional District.
Thomas Paine
@Thomas1774Paine
Classified Memo Proves Hillary Supplied Weapons from Benghazi to Al-Qaeda in Syria; DOJ Could Still Indict
https://truepundit.com/classified-memo-proves-hillary-supplied-weapons-from-benghazi-to-al-qaeda-in-syria-doj-could-still-indict/