There has to be a lot of nuance with respect to Indigenous ancestry, especially since a large population of Indigenous peoples lost their connection to their heritage through the process of colonialism.
That said, it is not uncommon for public figures to try use their ancestry to try and leverage their position in society.
https://en.wikipedia.org/wiki/Iron_Eyes_Cody
https://thegeekbuzz.com/news/johnny-...ive-americans/