Rising cancer rates in the spotlight across Iowa midterm races as voters focus on water​Rising cancer rates in the spotlight across Iowa midterm races as voters focus on water 

 Roughly two in five Iowans will be diagnosed with cancer in their lifetimes. It’s a big concern for many voters, and now, it’s at the center of debates ahead of the midterms. NBC News’ Julie Tsirkin reports.  ​​Roughly two in five Iowans will be diagnosed with cancer in their lifetimes. It’s a big concern for many voters, and now, it’s at the center of debates ahead of the midterms. NBC News’ Julie Tsirkin reports.