Former U.S. President Barack Obama will endorse his longtime political ally Kamala Harris on Tuesday night in a high-profile speech that aims to boost her presidential bid over Republican Donald Trump. At 63, Obama maintains a legacy that looms large in moments of crisis, including during the messy deliberations that ultimately led President Joe Biden to step out of the race and endorse Harris, 59. More information with FRANCE 24 correspondent in Chicago, Fraser Jackson.