It takes a lot to alter votes for most folks, they have "their team" and will vote that way no matter what.
Some really BIG news can change votes with them, or depress them so they don't vote. Many of "us" vote simply for the perceived LOTE.
Take Walker, for example, let's stipulate for the moment he's unqualified to be Senator. He's still a reliable Republican vote. If you want a Republican Senate, you vote for him, simple as that, no matter what else might be afoot. (We could of course stipulate Warnock is unqualified also and reverse this, same thing.)
Just as we're OSU ot Wisconsin or Michigan fans, MOST voters are D or R fans. It keeps life simpler.