They understand it very well.
They do *not* believe it is relevant.
They do *not* believe the Constitution is relevant or controlling.
They believe limitations on government power are immoral.
They do *not* believe the Constitution is relevant or controlling.
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Even here on FR we have some of those.
Especially the fans of the Cubanadian who want another usurpation.
There is a process for changing the constitution actually 2 methods. They can propose an amendment or they can call a constitutional convention. Neither of the two will have enough votes so they are attempting to bypass the legal means.