How do Obama and Trump differ on concussion policy?

President-elect Donald Trump looks on during the Army-Navy football game Saturday at M&T Bank Stadium.Barack Obama and Donald Trump disagree on pretty much everything.

Climate change.

The Iran nuclear deal.

Russia.

Curiously enough, you can add concussions to the list of areas that divide the current president and president-elect.

Both Obama and, to a lesser extent, Trump have made public statements on concussions in sports, especially when it comes to whether athletes should come out of a game or shake off the injury and return to play.

During the eight years of the Obama administration, the attention paid to concussions has grown exponentially, although that’s not exactly the president’s doing.…