 That Trump staged the shooting for a photo op that the wound on his ear was caused by something other than an assassin's bullet and that he was never in mortal danger. It's a baseless conspiracy theory disproven by reams of documentary evidence and eyewitness accounts. And it's a belief held by one third of the Democratic electorate. One in three registered voters believe it is credible that the shooting Saturday in Butler, Pennsylvania was staged and not intended to kill Trump.