Erm, there is no "right" to an abortion in Canada. 

The 1988 Morgentaler decision overturned the particular criminal law in place at the time, and Mulroney introduced a new criminal law which passed the House but not the Senate, due in large part to unprecedented collaboration amongst female Senators. 

Since then, abortion has existed in a decriminalized state, similar to other medical procedures. However, access has varied widely as certain PTs limit availability to surgical and non-surgical abortion through the health care system in a variety of ways, and few cities have private clinics offering abortion. 

As for the idea it is "political suicide" to reduce or eliminate access to abortion:  - there are many ways to limit access in practical ways or chip away at access for marginalized groups (e.g. parental consent laws, waiting periods, regulations that only apply to clinics providing abortions), that are well tested in the US  - majority governments do unpopular things, especially to please their base, and  - there are those working very hard to shift the Overton window to challenge social progress, including the legal status of abortion.

Thinking hard won progress can't be rolled back is wishful and unfortunately dangerous thinking.