Partnership Expansion was allowed as a 'take away' when the medicaid laws changed. The basics behind it are that if you purchase a partnership eligible Long Term Care insurance policy you'll receive some asset protection from medicaid spend down. In essence they are "partnering" with you to pay for potential LTC costs in the future. The government allows you to shelter, dollar for dollar, the amount you've received from a LTC insurance policy if you run spend through your whole policy.
As an example, let's take an individual with a 250k nest egg that is diagnosed with Alzheimers. If that person doesnt have LTC insurance they'd have to spend down their own assets until they were almost financially wiped out, then they'd be eligible for Medicaid. If you had a hypothetical $240k LTC policy (not partnership), he would have to use the policy and if it ran out, would have to spend the majority of his $250k, then be eligible for Medicaid. With a LTC partnership policy, if he ran through 240k policy he would receive 240k worth of protection and would only need to spend 10k of his assets before becoming eligible for medicaid. This would leave the "protected" $240 for his family, church, charity, Texas A&M University, etc.
That's really a high level run through for you. As I mentioned earlier, it's still not available in TX yet (FL went live last week, VA is next month) but will be soon. If you need a deeper dive into any of this feel free to PM me.
DJ