President Joe Biden tested positive for Covid, leading to the cancellation of his speech at the UnidosUS conference in Las Vegas where he planned to announce a program benefiting certain U.S. citizens' spouses without legal status. Biden's illness comes amidst calls for him to withdraw from the presidential race due to health concerns and a recent assassination attempt on his opponent, Donald Trump. Despite mild symptoms, Biden intends to continue his duties while self-isolating in Delaware, aiming to secure support from key voter groups like Black and Latino communities for his reelection campaign.