That is what liberals want to do. They want to control private enterprise. Reigning in insurance companies is not now nor has it ever been a conservative value. Insurance companies compete on the open market. Reigning them in limits our liberty. If they can reign in the insurance companies, then they can reign in you and me. Which is exactly that the "mandate" does.
What the mandate does now gives the insurance companies the power. What Mr. Trump wants to do is take away that power, and give it back to the people and businesses.
Actually, if it weren’t for insurance companies, we wouldn’t need insurance, as medical providers would not jack up prices to obscene levels, and free market competition would kick in.
Medical costs would be far less expensive, as it is in many countries, while at the same time, providing quality care.