sarah palin is weighing in, as her daughter overcomes a difficult week on the dance floor. abc's nick wattas the story. >> reporter: it was one of the most tear-filled blow joups we've ever seen. >> reporter: bristol palin was an emotional wreck this week. partner strain and something potentially more serious. >> what are you saying? >> you're not there. >> reporter: her mom, sarah, backstage, before the show, broke sinister news on facebook. i'm sorry to say she's getting those annoying death threats and more mystery white powder sent to her while on dwt this all-star season. a package was sent the last time she was on the show in 2010. this time, bristol is defiant. >> we have security here. we feel safe. i think we're okay. >> reporter: so, who would threaten the daughter of momma grizzly? >> someone who maybe doesn't have a lot going on in their life. and so, a show like "dancing with the stars," unfortunately, is an ideal target for people who want to just send threats. >> reporter: a man tried to break into the studio to meet gymnast shawn johnson when she was on the show. a gun, duc