The USSC striking down state constitutional amendments, or their own prior rulings, is not a good example, since these are struck down only because they conflict with the US Constitution or its 'newest interpretation'.
It as as good an example as you will find. Romer v. Evans, a Colorado state AM was struck down as violating the Equal Protection Clause.
As you see, Romer dealt with gays and lesbians not being permitted to engage in the political process.
Thee same with Jeff's left handed example, it violates the Equal Protection clause, or would.
How can the USSC lawfully declare any part of a duly amended US Consitution Unconstitutional?
I keep reiterating, there is nothing that can stop them from doing so. If anyone can tell me HOW they can be stopped, please tell me. Again, the seperation of powers showdown comes later.
The same constitution that permits the repeal of an AM permits the SC to rule one UNconstitutional by wording, period.
Since it has never been done, it is assumed they never will or can't, not true!
The only plausible scenario is if the amendment conflicts with any other provision of the constitution. Pretty unlikely since the minimum 75% of Congress (and US citizens) favoring amendment would presumably get the wording right prior to ratifying it.
What is there were a ratified Constitutional AM that ordered the secession of California, would that be okay?
But absent this scenario, the USSC striking down a consitutional amendment may violate its lawful mandate to uphold the Constitution, and subject any rebel Justices to impeachment, trial, and removal from office.
They would be upholding the Constitution, as with any other ruling. What if there passed an AM that did away with the U.S. House of Represenatives and we then had a Unicameral legislature, but no provision was left concerning Impeachments, as the House has the sole power of impeachment.
Abraham Lincoln suspended habeas corpus and ordered the arrest of the Maryland legislature to keep them from voting for secession. How was that legal and upholding the Constitution?
The point is, again, no one can stop a person/entity from doing anything.
But it cannot be argued the Supreme Court can do whatever it wishes.
Although historically their rulings have often been ignored or circumvented by states, since the USSC has no direct means of enforcing its rulings, and must generally rely on the good graces of the legislative and executive branches to put teeth into their rulings.
This reinforces my idea of the Little Rock 9 example. The SC ordered the desegregation of schools, and the Executive Branch followed the rule of law and enforced it.
Also historically, thier rulings have not been ignored by the states. This is not to say every single decision in history has not been complied with though, but since the Supremacy Clause was brought up, it also states ever court in the Country is bound to follow a SC decision. So who will the court's side with, such as a federal AM based on Romer, or the SC who strikes it down, both are a Supremacy clause conflict then??