Sure, speaking in terms of why he could bring more votes:

• He was a teacher for 20 years and has a Midwestern small town vibe that could appeal to a lot of voters
• He has so much charisma and isn’t afraid to call out far right leadership, but he does it in a way that does not alienate that voter base. He has even taken his message to fox news.
• He started the whole “weird” thing that is now being used effectively to nullify Trump and Vance’s empty rhetoric.
• His record as gov in Minnesota speaks for itself
• He’s very popular among labor unions

You really need to listen to him speak to understand his potential impact. Here’s a 10 min video containing a few of the interviews I’ve seen (after the short intro): https://www.youtube.com/watch?v=k1-nR3dRCAM