It has been going along long enough that most people my age or younger would be Republican, not Democratic. Just because your parents have a certain set of beliefs doesn't mean that you do. For example, all of my sister in laws come from very Republican families (one family are wealthy Coptic Christians, another are crazy border patrol people from the only conservative/moderate area in Vermont, and the last one from rural Central Nebraska) even though they are all liberals of varying degrees.
Kind of a non sequitur. This thread is about parents and why they lean Republican. I never suggested that their children would also lean Republican.
In a vacuum, I agree but various columnists and think tank professors has used this argument to claim that society was going to become homogenously conservative in the future because of how unsuccessful liberals are in propagating themselves.
It's kind of up there with the notion that white people are going to go extinct because 1) there's more opportunities for different types of people to have children, and 2) white genes are recessive and all based on the fact that it's three times likelier that a child won't be white if only one of their parents is white. White people aren't going extinct.
If you are willing to separate it from its implications, sure.