This week, Joe Biden announced he is seeking re-election. The 80-year-old US president says he wants to "finish the job". His announcement came as no surprise and sets the stage for a possible rematch next year between Biden and former president Donald Trump. In a campaign video announcing his bid, Biden took aim at what he called "MAGA extremists". But is Biden's advanced age a problem? We get some analysis with FRANCE 24's Monte Francis.