>>> i'm camilo montoya galvez at the arizona border where hundreds of migrants are crossing into the u.s. each day undeterred by border walls and a treacherous terrain. >>> later, after six decades of collecting art, a couple shares their historic finds with the world. >> the things in this exhibit belong to everybody. ♪ >>> this is the "cbs weekend news." from washington with adriana diaz. >> good evening. i'm nancy cordes in for adriana. we begin with breaking political news from south carolina. cbs news projects donald trump will win the state's republican primary. this marks the fourth win for the former president, having already swept contests in iowa, new hampshire, and nevada in the republican race for president. trump's victory is a particularly painful loss for opposing candidate nikki haley because this is her home turf having previously served as governor of the palmetto state. she voted with her family today. chief election and campaign correspondent robert costa is at the haley campaign watch party in charleston. bob, former president trump has already declared victory t