To be clear, Robb Hogg would've also lost by a lot - but I'm almost enticed by that what if. Patty Judge was a prime example of the kind of recruiting that Democrats were doing in 2016 - big names, regardless of substance. I don't know what kind of campaign or how energetic her campaign was, but if it was anything like Feingold, Strickland, or even Hassan who barely edged a win, I can't imagine it was that great.
To be fair to Patty Judge, she had the best performance of all of Grassley's opponents since his first victory. And this in a very Republican year in Iowa.