They aren’t “secret” voters to anyone with a brain.
They are “secret” to the media.
And this is a worldwide trend, not just a US or Trump connected trend. In the recent Australian elections, the pollsters once again missed a “secret” conservative vote—even in their exit polls. They simply won’t acknowledge that conservatives don’t want to talk to the liberal media.
It’s really funny to see the far left Australia tv pundits and their glum faces over this result.
Sorta like watching the US tv media react to the Trump win in 2016.