If you look at the home page for Universal, they have offices and facilities all over the world, including Malawi and across the the US , so importing from Malawi is not impossible at all, at least according to logistics. If there are regulatory or tariff impediments, that could be an issue.Absolutely. Those are in no way related or similar to Flue Cured varietals that pipe smokers call Virginias.
You don't see US companies using them at all. My guess would be that importing tobaccos from Africa is just not feasible. You don't see much of anything imported to the US from Africa besides minerals, gems, coffee and cocoa. This would be a good question for Jeremy Reeves.
And here's some good news for Malawian exports: