Of course we’re not operating within Constitutional boundaries. We’re no longer operating according to Constitutional rule. There are prescribed procedures for making changes to the Constitution. It’s unconstitutional to operate unconstitutionally just because someone says they feel good about it.
Political parties are what one might call extra-Constitutional. The US political system is not a partisan system. If you want partisan politics to represent the views of the people the way you describe, then you need a multi-party representational system - which the US does not have.
The poor quality of our de facto “two-party system” is a far cry from evidence that the majority opposes politicians who believe in Constitutional rule. That’s just a naughty argument.