Loyalty doesn't necessarily have a time limit (or border, for that matter). I submit that seven years should be struck; If you "hold or have held citizenship or the right of lawful permanent residency in any nation other than that of the United States", then your loyalty is in serious question or at the very least will always be a higher factor unknown.

Granted, that even those born here can be disloyal, but they are ours, and at least would mostly not have foreign loyalties from the outset unless corrupted by foreign powers.

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Irregular Warfare is now in play