Of course, that's a bit delusional. The people who don't vote might well be sending message, but it's impossible to discern.
It might be, "I don't care about politics." It might be, "I was drunk and I forgot." There are a million reasons for not voting, but sending a message isn't one of them if it's impossible to know what the message is.
Oh, I’ll vote — I always vote. We’re going to need all the down-ticket conservatives we can get.