He's a life long republican and third generation dairy farmer but has only been a senator for two years.
His reputation for being a straight arrow was so strong apparently, that a number of GOP members expressed concerns about what he would reveal upon the conclusion of his 8 month investigation into every election fraud claim made. Of course, he found absolutely nothing and was utterly shocked when his colleagues continued to endorse Trump's big lie.
Hours after McBroom released his full report, Trump accused him of conducting a coverup, claiming he had been bought off by the Chinese, and then proceeded to published his phone number online.
https://www.theatlantic.com/politics/archive/2021/06/michigan-republican-truth-election-fraud/619326/
https://www.youtube.com/watch?v=y-uU-p1CnVA
https://www.youtube.com/watch?v=KtlssTg--mI