tRump daughter uses Beatles song without permission, everyone stands for her as she walks on stage.

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13. You don't *legally* need permission. However,

Ethically, they're implying an endorsement from the artists, so there's some deception going on here.

And politically, it runs the risk that the media will give some airtime to the artists for them to say they don't endorse that candidate or that they explicitly endorse the other candidate.

This is why good campaigns, stick with songs they got the artists' permission to use. But republicans always figure the rules don't apply to them.