Joni Ernst, a Republican Senate candidate in Iowa, was made in the Sarah Palin mold — her first TV ad focused on her experience castrating hogs. Perhaps high off the buzz and Palin endorsement that that ad generated, Ernst just released another TV spot that is beyond parody. The 30-second spot, titled "Shot," features Ernst at the shooting range, "unloading" on Obamacare. The narrator's lines sound like a Palin speech run through the shredder. As Ernst rides into the frame on a Harley, we hear, "Conservative Joni Ernst: Mom, Farm Girl, and a Lieutenant Colonel who carries more than just...