The Obamacare that Donald Trump pledges to scrap in 2025 is not the same law that the GOP targeted during his first year in office — making it politically uncomfortable for the former president’s fellow Republicans to embrace a wholesale repeal.

More than 40 million people have health insurance through the Affordable Care Act, up 50 percent from 2017. New subsidies enacted under the Biden administration have lowered premium costs, boosting the private exchanges. And, since Republicans last attempted to repeal the law, nine red and purple states have opted to expand Medicaid — many by popular vote — taking advantage of the enhanced federal funding Obamacare offers and extending coverage to millions of low-income people.

“Policies have changed,” said Sen. Thom Tillis (R-N.C.), whose state’s Medicaid expansion began Friday and is expected to add 600,000 people to the program’s rolls. It would have been one thing, he added, to replace Obamacare “long before” so many states came to rely on it.

Now, he said in an interview Thursday, while he remains critical of the law, “it’s not that simple.”