US health care , Obamacare, has certainly driven US doctors into retirement or back to their home countries...happily for US  citizens, Obamacare is about to be allowed to collapse under its own weight and a more effective and effective health care system will take its place, friendlier to MDs and US patients.

The flow of MDs will reverse.

The positive changes in the USA coincides with the deterioration of the Canadian and Ontario health care services which are  become increasingly less friendly to Canadian patients and towards Ontario doctors in particular.

One can anticipate an increasing flow of Ontario MDs to the South as office leases etc., come to an end....government's Federal and Provincial playing games with incorporation will merely accelerate it.

Let's face it, MDs on both sides of the border thought that Hillary Clinton would be President in 2017 and that Obamacare / Hillary carewould become even more onerous.

The old  plans have been ripped up and new ones made.