More donors and also potentially higher polling. so it's really critical for some of those lower tier candidates right now to show that they do have the strength and the operation to be able to continue going forward. martin. >> arlette, the candidates are holding several events in iowa there. front-runner joe biden is about to hold a rally. i'm wondering, where does he stand in the eyes of iowa voters? >> reporter: well, joe biden has been leading here consistently in the state since he entered the race back in april, but he's closely trailed by bernie sanders and elizabeth warren. later toni...