The latest KFF Health Tracking Poll finds health care ranking among the top issues voters want to hear candidates talk about during their congressional campaigns, with health care cost ranking as the top health care issue for voters across partisanship. However, for many voters, including one-third of Republican voters, a candidate’ position on President Trump will make the biggest difference in how they vote in 2018. This month’s poll also takes an in-depth look at voters who say a candidate’s position on health care will be the “most important factor” in their 2018 congressional vote choice, otherwise known as “health care voters.”