In past elections I have noticed that mail voters for both parties tend to vote more heavily for the establishment candidates. Although the proportion of total voters they make up is somewhere around 2%.
These results are based on 2 counties in northeast Indiana which did primaries in early June, Allen which includes Fort Wayne, and Whitley to its west. I share these because they present a stark contrast.
Allen Democrats:
Mail Voters - 16704, 61%
Biden 84.0%
Sanders 8.9%
Buttigieg 2.7%
Warren 2.4%
Other 2.0%
In-Person Early Voters - 1115, 4%
Biden 76.6%
Sanders 14.9%
Warren 2.8%
Buttigieg 2.5%
Other 3.2%
Election Day Voters - 9706, 35%
Biden 66.1%
Sanders 23.6%
Buttigieg 3.5%
Warren 3.3%
Other 3.5%
Whitley Democrats:
Mail Voters - 769, 55%
Biden 85.2%
Sanders 8.7%
Buttigieg 3.4%
Other 2.7%
Early In-Person Voters - 56, 4%
Biden 82.1%
Sanders 12.5%
Warren 3.6%
Other 1.8%
Election Day Voters - 518, 41%
Biden 67.2%
Sanders 19.1%
Buttigieg 5.0%
Warren 2.6%
Other 6.0%
There's a similar outsized performance for the Democrats' sacrificial lamb for the Congress election on his mail vote compared to his in-person vote, although that was a more open race. (so in Whiltey the mail vote for him was 54%, election day vote for him was 32%)
The Republican vote for president and Congress were both 2-way races and the results were more or less uniform across the board.
Anyone seeing similar things elsewhere? I'm not saying anything untoward is happening here, but it's a unique breakdown of 2 different electorates for the same races in a primary that is outside the norms of what would be expected from regular statistical deviation.
