Every elected official in the United States swears and oath of office to uphold the Constitution of the United States.
But oaths don’t mean what they used to.
Here is the problem: A Christian can take an oath to uphold the Constitution of the United States, and they don’t have to worry about their religion getting in the way because Christianity is generally not incompatible with a Constitutional Republic, at least not the way our Constitution is set up.
The same cannot be said of Islam. If a Muslim takes an oath to uphold the Constitution of the United States, they can and will run afoul of the Koran and Islam, because Islam is fundamentally incompatible with the principles of the US Constitution.
If a Muslim takes an oath to uphold the Constitution, and obeys that oath when it conflicts with Islamic doctrine as outlined in the Koran, that makes them an apostate, a far more serious crime against Islam than being an unbeliever.
Unbelievers can be converted to Islam. Apostates have seen the truth and rejected it, and the punishments for that are more serious and unforgiving (in their eyes)
“But oaths don’t mean what they used to.”
Pretty much just a formality anymore. Some people will say “til death do us part” in a wedding ceremony when they have already drawn up a contract stating the terms of divorce should they decide to break their vows. I am convinced that a majority of Americans now just “rattle their mouths” with little regard to what they are actually saying.