Lol. I believe this is a Likely R race. But choose to believe this poll if you want.
We see few polls in Indiana. The common wisdom was that the Republicans would defeat Donnelly in a strong-R state. 50% wins.
Note that Trump approval is abysmal in Indiana -- for Indiana. That matters greatly. Unless you want to claim that this poll has a bad sample, don't argue with it. This is a Republican pollster; wait for the next one or the 2016 election to see how this result goes.
Indiana is very rural. Does anyone think that the tariffs and trade war will help Republicans of any kind in the Hoosier State?