The decision is "president" set by a ruling of the court. A president is a ruling of that particular court, at that particular time. A law, is a written entity. No where in the constitution do you find a "law" about abortion on demand. The president can be overturned if the court changes it's mind. That's why we have the constitution, it allows such things. That's why the left hates that document so much.
The left screams that Roe v. Wade is a 'law'. That is farther from the truth than Friday is from Monday. This is the left's biggest lie. Don't fall for it!
You mean a "precedent"? That which preceeds?