The European Commission is set to hold a summit with Romanian authorities and TikTok as regulators in Bucharest threatened to suspend the Chinese-owned social media platform over its role in a presidential election stunner. A first-round vote on Sunday propelled the ultranationalist, pro-Russian firebrand Călin Georgescu to a shock victory in part thanks to his sudden popularity on TikTok. The app is under mounting pressure to explain how it handled political content in Romania. Bucharest has asked the European Commission to launch a formal investigation into the app under the bloc’s social media rules, and a top EU lawmaker demanded…