(Bloomberg) -- Foreign Secretary Liz Truss pledged to crack down on Chinese-owned companies such as social-media giant TikTok Inc. as she traded blows with Rishi Sunak in their first head-to-head debate of the race to succeed Boris Johnson as UK prime minister. “We absolutely should be cracking down on those types of companies, and we should be limiting the amount of technology exports we do to authoritarian regimes,” Truss said Monday during the debate on BBC TV. Truss’s comments on TikTok, the popular video-sharing app owned by Chinese tech company ByteDance Ltd, builds on Sunday’s back-and-forth between the two contenders...