Republican presidential hopefuls have largely shunned TikTok, the hugely popular video-sharing app that some in both parties allege is a potential spy mechanism for China. But entrepreneur Vivek Ramaswamy recently became the first 2024 candidate to join the platform, which says it has over 150 million U.S. users. That's even as he's accused Beijing of pushing TikTok as “digital fentanyl” to Americans and wants the app banned entirely. “We’re in this to reach young people, to energize young people, and to do that, we can’t just hide,” Ramaswamy said in his first post earlier this month. “You can’t play in…