Agencies Elon Musk’s ties to China through his role as electric car brand Tesla’s biggest shareholder could add complexity to his bid to buy Twitter. Other companies that want access to China give in to pressure to follow Beijing’s positions on Taiwan and other issues. But Twitter is shut out by internet barriers that block most Chinese users from seeing global social media, which gives Beijing no leverage over the company, though the ruling Communist Party uses it to spread propaganda abroad. Tesla Inc.’s ambitions in China might give Beijing that leverage to pressure Twitter to silence human rights activists...