Republican Senator Rand Paul hit out at GOP healthcare legislation Sunday, warning that the bill isn't a repeal and keeps the "fundamental flaw" of Obamacare.

"I think the longer the bill is out there, the more conservative Republicans are going to discover that it's not repeal, and the more that everybody is going to discover that it keeps the fundamental flaw of Obamacare." Paul said on CBS' Face The Nation.

"It keeps the insurance mandates that cause the prices to rise, which chase young, healthy people out of the marketplace, and leads to what people call adverse selection, where you have a sicker and sicker insurance pool, and the premiums keep rising through the roof." the Senator urged.

Paul noted that while Republicans have complained ad nauseum about Obamacare, they still intend to keep its core intact in their bill, expected to be further debated this week.

"And the reason you know Republicans acknowledge this is, they make a giant insurance fund to subsidize those prices." Paul said.

"Basically, they're subsidizing the death spiral of Obamacare." the Senator exclaimed.

"So, for all Republicans' complaints about the death spiral of Obamacare, they don't fix it. They simply subsidize it with taxpayer moneys, which I just don't agree with at all."