THE United States said it is restricting entry to people "believed to be responsible for, or complicit in, undermining democracy in Nigeria" and their family members ahead of that country's elections this year. "Additional persons who undermine the democratic process in Nigeria — including in the lead-up to, during, and following Nigeria’s 2023 elections — may be found ineligible for U.S. visas under this policy," U.S. Secretary of State Antony Blinken said in a statement. Nigerian President Muhammadu Buhari will step down after serving two four-year terms following a Feb. 25, 2023 ballot. Nigeria, Africa's largest economy, is facing unprecedented insecurity that…