Well, the Republicans in Congress do vote against single-payer healthcare. Probably because companies lobby against it. And while conservative families may want better healthcare, they're not going to get it as long as they vote for Republican politicians. Or moderate Democrats for that matter, because they're really not so different when it comes to corporate lobbying.
If you want actual representation, you first need to change the system.
If you want actual representation, you first need to change the system.