“Uphold the Supreme Law of the Land. “
How?
By fulfilling all of the Constitution's stated purposes:
"...to form a more perfect Union, establish Justice, insure domestic Tranquility, provide for the common defense, promote the general Welfare, and secure the Blessings of Liberty to ourselves and our Posterity, do ordain and establish this Constitution for the United States of America."
Every single clause of which is grossly violated by abortion and euthanasia.
When you destroy the cornerstone and the foundations, which in the case of this free republic is the assertion of God-given rights and the obligation to equally protect them, you're bringing down the whole edifice.