Repeal ACA now and maybe replace later
President Trump has joined with other Republican officials in a lawsuit asking the Supreme Court to overturn the Affordable Care Act (ACA). (see Trump Administration Asks Supreme Court to Strike Down Affordable Care Act.)
A brief quote from that article:
If successful, the move would permanently end the health insurance program popularly known as Obamacare and wipe out coverage for as many as 23 million Americans.