The British should decide this. Obama, Trump, and Trudeau should butt out.
Trump said two things:
1) Leaving the EU would not put Britain at the back of the queue to secure a US trade deal under his presidency
and
2) If I were from Britain I would probably want to go back to a different system-
Perfectly valid points. However, both Obama and Trudeau tell the British people how they should vote - something Tump did not do.