I don't wan't to derail the topics here, but:
And if he doesn't then the ACLU should take up his case.
I doubt the ACLU would take the case. The positition of the ACLU seems to be that the Second Amendment does not grant an individual right to carry fire arms.
The ACLU and the Second Amendment
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Added by edit
Unless Andreychenko was treated in an arbitrarily unfair manner compared to other individuals in a similar situation. Then that would be a Fourteenth Amendment violation, which might interest the ACLU.
Edited by Chiroptera, : No reason given.
It says something about the qualities of our current president that the best argument anyone has made in his defense is that he didn't know what he was talking about. -- Paul Krugman