President Donald Trump has promised to usher in a new era in America's top investigative unit — the Federal Bureau of Investigation (FBI) — with day one changes being implemented as key senior roles were reassigned. The agency's shakeup began when former FBI Director Christopher Wray, who was nominated by Trump in his first administration, announced last month that he would step down from his post. Hours before Trump was sworn in, acting director Paul Abbate similarly stepped down. The Associated Press reported, citing a person familiar with the matter, that the longtime head of the Justice Department’s office of...