President Joe Biden hosted Angolan President João Manuel Gonçalves Lourenço in the Oval Office on Thursday as he sought to reaffirm his commitment to Africa even as two wars consume much of his administration's foreign policy focus. The White House meeting follows Angola's move to position itself as a strategic partner to the United States and as it has shifted away from Russian and Chinese influence under Lourenço's tenure. The visit comes as Biden appears set to break his commitment to African leaders to visit the continent this year — though senio...