I see a slippery slope, too, but it's the opposite one.  It has to with judicial activism that has been increasing daily for decades.

We have pharmacists that don't have to fill scrips for day after pills.  We have Catholic schools at all levels that would not admit Omar El Hassan.  High end restaurants require a suit and tie.  A court somewhere confirmed the right of men to have a boys only club. Yet some wonky bakery owners don't want to bake a cake for 2 gay guys and this ends up with SCOTUS?  That means a civil rights violation.  What civil right is being violated?  

People comparing this to segregation are using a term with 2 definitions.  The "civil rights movement" was to give blacks equality.  But today's definition has become so expanded that any federal law (like ADA) can be exploited in ways that dictate to private businesses.

The President isn't the most powerful person in this country.  It's the 9 tribe members composing SCOTUS.