主要是陳水扁這個先例，基本隻有華人知道。不過美國人懷疑演戲的也不少。

copied from reddit.

Since watching the video, I do think this could be a stunt. He grabbed his ear, and I'm thinking he had a blood capsule in his hand when he did. Breaks the capsule on the side of his head and that's when secret service jumps on him. As many have said already, a bullet grazing a person's ear is going to do way more damage than what we saw. Not to mention how he isn't in shock at all by the "shooting" he gets right back up, yelling "fight", and pumping his fist to the small group attending the rally. Seems very planned out and suspicious to me. Secret service were acting strangely and had a small woman in front trying to block his comparably larger body. The car was right there waiting like a getaway car. There is much more in question as well regarding the people who were there responding to the situation,, why they took the shooter's body away like they did? Why no chalk outline? Call to the coroner? Medical personnel? No taping off the area with "police line, do not cross" tape? Also, when Biden spoke about it later that night, he specifically didn't call it an assassination attempt when asked by a reporter. He said he had thoughts on the event, but didn't want to decide on it without all the facts. There's a ton of questions about this stupid stunt.