United States government has threatened to slam a visa ban on Nigerians who overstay their visas. The US Mission in Nigeria posted the warning via its X (formerly twitter) Monday. It said that violators could face permanent bans from re-entering the American country. It said, “If you remain in the United States beyond your authorized period of stay, you could face a permanent ban on travelling to the United States in future.’’ Since the return of President Donald Trump to power, America has become stricter with its immigration policies.