Idaho's Republican Primary: A Proxy War for Trump's Legacy Idaho has long been a stronghold of Republicanism, its deep red streak dating back to 1974 when it last sent a Democrat to the US Senate.
The November general election is often an afterthought, with Republican winners likely to sail to victory without much fanfare.
However, beneath this solidly red surface lies a complex web of ideological tensions between moderates and hardline conservatives vying for control.