Robust safety measures are required before the Confederation of African Football gives the green light to Kenya, Tanzania and Uganda to host CHAN.
He had "been receiving specialized treatment in South Africa", his party says.
The bank had ended all lending to Uganda two years ago because of a harsh, new anti-LGBTQ law.
Seven of the 12 countries whose nationals are banned from going to the US are in Africa.
Voters are heading to the polls following a campaign period marked by reports of political repression.
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