I see arguments like this all the time these days, and it feels important to me to have the story straightened out.

Can anyone recommend a resource that comes to a definitive, non-partisan conclusion (even if the answer is: "it's complicated," or "neither")?

(Separately, it's interesting to ask LLMs questions like this: https://chatgpt.com/share/68cc9e37-8a2c-800e-aeef-dc88977f56...)

https://politics.stackexchange.com/questions/80552/total-tax...

(Though this doesn’t capture top end federal income tax rate.)