In recent presidential elections, Ohio has become a reliably Republican state. But in this year's midterms, it's once again a battleground. The races for governor and U.S. Senate are both seen as toss-ups by The Cook Political Report, and there are a handful of competitive House districts. Liz Landers reports on how national issues are affecting Ohio voters as they prepare to head to the polls.

For many Arizona voters, the top concern heading into the midterms isn't inflation, immigration or education. It's water. With the state gripped by prolonged drought, candidates are facing growing questions about how to secure its water future. Stephanie Sy reports for our series, Tipping Point.