We DO need to replace it!
We need federal legislation which:
1) Gets the Federal government out of the healthcare provider business once and for all by explicitly leaving it TO THE STATES (per the 9th & 10th Amendments);
2) Repeals the Federal statute that forces emergency rooms to treat patients without cost; again, leave that to the states;
3) Fix Medicare by leaving ALL implementation details to the states.
We have lots of "Replacing" to do. They key is to define it within a conservative, small-government worldview.
I guess I am just fearful that he’ll replace it with his own version of central control of healthcare. I sincerely hope not.