Klobuchar, Castro and Gabbard better get to an animal shelter. Not that I'd vote for Gabbard anyhow.

Buttigieg, Gillibrand, O'Rourke, Hickenlooper, Booker, Inslee (lost his dog, has "granddogs" ) have dogs.

Kamala Harris is a strong supporter of animal protection bills and frequently tweets dog related posts, but doesn't currently own a dog;

Biden- Two dog Major and Champ
Booker- No dog but will get one if elected
Buttigieg- Two dogs named Buddy and Truman
Castro- ?
Delaney- ?
Gabbard- ?
Gillibrand- Dog named Maple
Gillum- ?
Harris- ?
Hickenlooper- Dog named Skye
Inslee- No dogs of his own but his kids have dogs named Pepper and Tilly
Klobuchar- ?
Messam- ?
O'Rourke- Two dogs named Artemis and Rosie. Also a cat named Silver.
Sanders- ?
Warren-Dog named Bailey
Williamson- ?
Yang- ?

Major was a rescue, and is now a couple of years old, Champ is an older dog.
Liz Warren has a Golden Retreiver named Bailey.
Not sure of anyone else.

I wouldn't put much stock in it as some kind of mark of character.

There might be reasonable practical reasons for not keeping a pet during a particular period of time, and some people have allergies, though even that doesn't always preclude pets. Bill and Hillary had a cat, Socks, even though Bill is allergic to them. The Obama girls have allergies but they got a dog of a breed that's somewhat hypo-allergenic. Not liking animals strongly suggests a person is, indeed, a d-bag. The reverse isn't necessarily true, of course; Mike Pence has pets. Trump thought it was low-class for the Pences to bring their pets with them to Washington.

It's not some litmus test of ones humanity if you don't like cats or dogs. Plenty of evil people love their dogs.

Some bad people do like dogs (not because these are kind, loving people, but more likely because dogs are obedient), but good, kind people do not dislike dogs or other animals. A person who dislikes animals is not at heart a nice person.

I've only known a few, but each of them were cold, fearful, uptight, untrusting and untrustable.

Having a dog does not necessarily indicate an estimable character, but disliking animals in general is a data-driven indicator of certain personality traits.

that's a tad extreme. We're talking about does not having a dog mean anything about the person. The answer is no.

He wouldn't know class if it bit him in the rear - as any smart dog would do.

There's a great pic of him behind the podium with the WH logo in the background.

Bizarre fact: Hitler — yes Hitler — was a lover of dogs. It is widely known that he had an adored German shepherd named Blondi. According to a tome penned by Hitler's final secretary, he spoke at great lengths about his pup, like most doting dog owners you know. Needless to say, the love between demagogue and furry creature loomed large.

Meanwhile in 2016, president elect Donald Trump is considering getting a golden doodle named Patton. Do with that information what you will.

If that doesn't make much sense to you, you're not alone. But the truth is that even horrible people can love fluffy things. In fact, there are more than a few political leaders, dictators, and men of ill repute who adore animals. There have been dictators who've caressed their horses and much-hated imperialists who've cuddled little lion cubs. Perhaps dogs, cats, lions, horses are the great equalizers? Or maybe those in great power grow lonely and eventually seek out furry companions because dogs don't care about communism. (Or do they? It's a thought worth pondering.)

Ahead, find the tyrants who took on a pet — consider it an exercise in cognitive dissonance.

https://www.refinery29.com/en-us/famous-dictators-pets-dogs