It might be an attempt so bad that a future Mike Duncan good naturedly mocks the folly of those that made the attempt and also notes that everything that could go wrong did go wrong.

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i'm sure they do, and i'm sure they can see that, given that there is no organized opposition, they are nowhere near that cutoff point.

What a lifetime of "no meaningful consequences" does to a mf'er...

The French Empire lasted centuries before the first revolution. Then the monarchy was restored three or four more times, before finally collapsing under its own weight with the ascendancy of Napoleon III. Even afterwards, royalists and other monied elites have continued to run roughshod over France straight up into the modern day. What current living French aristocrat genuinely fears the guillotine today? And that's in a country with an active labor movement, a sizable leftist party coalition, and a rich history of assassinating royalty.

I don't think the SCOTUS judges fear any kind of backlash severe enough to endanger them, personally. Most of them are already elderly, and have been doing this ghoulish shit their entire adult lives without facing more than the odd Peaceful Protest. And very little in US History suggests your life is in danger should you trend too far to the right.