The only "prohibiting competition" rule is that currently insurance companies have to create plans for each state they want to operate in, and those plans have

The only "prohibiting competition" rule is that currently insurance companies have to create plans for each state they want to operate in, and those plans have to follow the laws in that state. Since not every state insurance commissioner is captured by the insurance industry, this is a big problem for them so they're heavily lobbying the feds to create a situation where insurance policies are regulated by the state the company is based out of. This will let them set up an operation like corporate governance and consumer lending have, where one of the most corrupt states like Delaware sets up rules that let insurance companies do whatever they want.