What is Medicare For All ?

Medicare For All is an ever increasing popular term to describe a Health system in which every American, not just the older turning 65 or disabled, get Health Insurance through the Government's Medicare System. 
Bernie Sanders has supported such a plan in his 2016 Run for the presidency. His plan would both expand traditional Medicare to cover all Citizens, and also to offer more services and do away with most deductibles and co-payments. This would change the structure of the Medicare older people are getting now. There would be no Private Health Insurance, The new Government system would cover everyone.
This type of Health Insurance is similar to the health care system in Canada. Maybe another option would be the option for citizens 50 and older to have the option to buy into Medicare as it exist now. you can bet politicians will be debating these issues in the upcoming election.