I think some people don't really believe we are at war, you can't believe it and even remotely consider letting the Democrats win. Not if you value your family and your life. But if you think it's only some kind of rather bothersome intellectual exercise that is claiming the lives of a few young people who might otherwise be killed in auto accidents or climbing mountains or other enterprises that tend to kill young people, then you might discount the seriousness of warfare and the disastrous consequences of losing.
Maybe it's a failure to really, truly face the fact that we are in a fight for our very existence. I guess if you don't believe that you can pick and choose less onerous situations, such as big spending, or government telephone conversation monitoring as something that will determine how you cast your vote.