text:  Hello, I'm Moira Alderson with the BBC News. Donald Trump has appealed for unity after the assassination attempt against him on Saturday at a campaign rally. In a statement issued in the past few minutes, he urged Americans to remain strong and determined. He said evil would not be allowed to win. Earlier, the US President Joe Biden led condemnation of the attack in Pennsylvania. There's no place in America for this kind of violence. It's sick. It's sick.