 That this entire event all week long is safe and secure so that the official proceedings of the convention can begin in the coming hours. President Biden has called for an independent investigation into Saturday's shooting. Republican Senator Ron Johnson. We want the American public to have total confidence that in the end we know exactly what happened. No covering up for anybody, no trying to make the agency look good or not quite so bad. We need all its gory detail and then we need to make sure this doesn't happen again.