I can sum it up in one word: solid.
Kaine has long been the frontrunner in the VEEP nominee derby, and, if you watched his introduction to the ticket on Saturday, you can see why. He's smart, surprisingly interesting and completely qualified to serve in the office.
There were more progressive choices that Clinton could have made, and it's impossible to know what exactly her thought process was or what advice she was getting. Kaine, however, makes a lot of sense and "checks a lot of boxes". He does have some negatives, but I think they are far outweighed by his positives. I do believe he adds value to the campaign team.
He's got a great resume in politics spanning over the last 22 years. He has spent time as a city councillor and a mayor. Kaine was elected Lieutenant Governor and then Governor in tight races. In 2012, he was elected to the U.S. Senate replacing Jim Webb. Kaine was on the shortlist to be Barack Obama's VEEP nominee in 2008.
Kaine's record is middle-of-the-road when it comes to many issues. He's no liberal, but he has shown an evolution to more progressive positions since leaving the Governor's Mansion. In a time where the Latino vote means so much, Kaine spent time in Central America as a missionary and is fluent in Spanish. Kaine also comes from the important swing state of the Commonwealth of Virginia. It goes without saying that Clinton needs that state in her column on November 8.
By all accounts, he's well-liked on both sides of the aisle and is a hard working member of the Senate. Hopefully, he will bring that attitude with him on the campaign trail. Kaine seems to be the kind of VEEP. He will be loyal and will not overshadow the nominee, but he will be ready to step in at a moment's notice if necessary.
So it's Trump/Pence, Johnson/Weld and Clinton/Kaine. Time will tell if Kaine is able to push Clinton over the top.