Except for a few blue enclaves, the Republican primary determines the legislature make-up. Unfortunately Congressman Mike Simpson survived his primary challenge.
I think what the article pointed out is that in order unseat an establishment Republican you need a quality candidate and not just someone spouting how MAGA they are.
The candidate has to remember the establishment Republican will have a lot of money behind them, making the job harder to defeat them, another key point in this article was instead of the civic organization circuit, the upstart Republicans went to county fairs, gun shows and pancake breakfasts.
Finally, once you get elected as an upstart Republican you have to follow thru on the agenda you advocated for.
“Unfortunately Congressman Mike Simpson survived his primary challenge.”
Bummer.