WASHINGTON --- President Joe Biden promised to visit Africa this year, but 2023 is drawing to a close with no trip in sight yet. Nor has Biden given any public indication he plans to attend the U.N. climate change conference that starts next week in Dubai. U.S. presidents tend to reveal their priorities through their calendars. Biden has pledged a closer relationship with African countries. He similarly has stressed the importance of global leadership on climate change. Presidential trips can come together very quickly if necessary. Biden has pulled off last-minute trips to Israel and Vietnam as well as a secretive journey to Ukraine. But the travel deadline is gettin...Keep on reading: Biden’s promised visit to Africa shows no signs of happening yet