Presidential hopeful Sen. Amy Klobuchar (D-MN) defended allegations she mistreats her staff, claiming that while "she can do better" her "toughness" will be asset on the world stage. "If you are a boss, you have to have high standards, and that is what I have always had. And that doesn't mean it's a popularity contest all the time," she told CNN's Poppy Harlow on Thursday. "And so I've had high standards for myself, high standards for our staff, and mostly I'm going to have high standards for the country."

Klobuchar dismissed reports that she mistreats her staff mistreatment, claiming her work ethic will help her against possible political foes, like Russian President Vladimir Putin. "One can always do better, and that means you want to be sure that you are listening to people if they felt that something was unfair, or they felt bad about something," she said. "But I still think that you have to demand good product. When you're out there on the world stage and dealing with people like Vladimir Putin, yeah, you want someone who's tough. You want someone that demands the answers and that's going to get things done, and that's what I've done my whole life."