I believe the funding (subsidy) is due to expire this summer. If nothing is done to extend/modify it Obmacare will self destruct.
They might take a closer look at carrier profit, much like the SAY they are doing with MA plans, and make some adjustments to carrier funding but that is just a WAG.
There are plenty of spaces to cut department funding, office space, personnel, redundant bureaucracy, etc and I suspect Obamacare and MA cuts will happen later rather than sooner.
New tariffs will increase healthcare costs by 20%, easily. And that will flow right down to health insurance premiums. Look at where our medical supplies come from.