I'm still wondering how an issue that the Supreme Court elevated to constitutional politics 40 years ago has any bearing on who you elect for President.
No matter what you or anyone thinks about abortion, the President does not have the power or the clout to amend the constitution.
The Constitution need not be amended; all it would take is a shift of power on the Supreme Court and then Congressional action (whether that would be Constitutional is another discussion). So, yes, the President does have, indirectly through his possible choices for the Supreme Court, the ability to cause that political issue - and others - to be overturned.