Klobuchar a much better choice than Abrams. Klobuchar has national experience. Midwest. Moderate. Helps Biden in the rust belt., her home state of Minnesota, neighboring WIsconsin,etc. (The battle will be WIsconsin, MIchigan....Biden strong in Pennsylvania).
Abrams. No national experience. None. Served about 10 or so years in the Georgia State House as a member of the minority party. No name recognition other than among political geeks. Lost a statewide election. Like O'Rourke in that regard. Losing a state wide election is not a credential to be President of the US. Would not be perceived as "ready" to take the helm should something happen to Biden.
Side note: Trump, Biden, Sanders, Bloomberg, Warren....all 70 or over. Coronavirus said to be a bigger risk for persons over 70.
If any of you saw the press conference / rally with Buttigieg, it was unmistakable who Biden *wants* as his running mate. Buttigieg won’t be the running mate, unfortunately, even if Biden is the nominee. But it was an interesting dynamic to watch.