The White House chief of staff is a prolific poster, though the content and purpose is hardly Trump-like.Washington’s hottest Twitter feed is now an acronym managed by Ron Klain. | Jacquelyn Martin/AP PhotoAfter four years in which the White House used Twitter as a tool to batter the media and knife political opponents, the Biden administration is trying a softer touch.Officials are using the social media platform to project a sense of competence and calm — not launch narcissistic tirades. It’s being deployed to woo lawmakers, and less often shame them. And instead of the president himself...…The White House chief of staff is a prolific poster, though the content and purpose is hardly Trump-like.Washington’s hottest Twitter feed is now an acronym managed by Ron Klain. | Jacquelyn Martin/AP PhotoAfter four years in which the White House used Twitter as a tool to batter the media and knife political opponents, the Biden administration is trying a softer touch.Officials are using the social media platform to project a sense of competence and calm — not launch narcissistic tirades. It’s being deployed to woo lawmakers, and less often shame them. And instead of the president himself...WW…