Twitter Inc.’s Canadian division announced Monday it had hired Jennifer Hollett as the company’s new head of news and government. Hollett, who began her new role Monday, stepped into the position previously filled by Steve Ladurantaye, who left the company in May for a job as the managing editor of digital news at the CBC. “Jennifer will bring a deep resume and wealth of experience to our team at Twitter Canada,” Christopher Doyle, Twitter’s head of media, said in an email. “As a veteran of Canadian media and politics, Jennifer has...