^While he might have underperformed Trump in some of the rural areas, I think he would have made up for it in the WOW counties. Plus, there were polls showing him very competitive in WI. I doubt Cruz does THAT much better in the Denver suburbs or with Hispanics (I'd say he loses the state by 2-3 points), but obviously we'll never find out.
He was competitive in WI but more so in CO. Don't think that just because he loses a state he isn't competitive there. Cruz makes up Trump's margin in CO to get it by less than 1% while WI goes for Clinton narrowly, maybe 2% margin.