Fox News has made the call and Ted Cruz is the projected winner in tonight's Idaho primary. This is his first win of the night, and a critical one after Mississippi and Michigan went to Donald Trump.
— Fox News (@FoxNews) March 9, 2016
Idaho is a proportional state as well, so we don't know the delegate count, but based on exit polling, it seems that Trump will take a large share of the 32 delegates.
It's not an upset, in that Cruz always had a really good chance of taking the state. This is a closed primary, which means there were no Democrats to help Donald Trump over the finish line