Sen. Amy Klobuchar (D-Minn.) is facing scrutiny over her treatment of congressional staff and her workplace demeanor, just days ahead of her decision about whether she will run for president in 2020. A number of former staffers who worked for Klobuchar spoke anonymously to BuzzFeed News, accusing the senator of often berating staff over small mistakes and creating a hostile work environment. BuzzFeed interviewed eight former aides and reviewed dozens of emails. A spokesperson for Klobuchar did not immediately respond to a request for comment from The Hill. BuzzFeed reported that Klobuchar often yelled, threw papers and flung objects and...