There is a growing, bipartisan chorus of politicians and experts who are speaking out against TikTok after a new report from Forbes declared that accounts, run by communist China’s state-run media, are surreptitiously trying to influence American politics. Some saw it as a deeply important cultural issue, given TikTok’s appeal to the young. Sen. Tom Cotton of Arkansas called the app an effort to “corrupt young Americans and teach them to hate their country.” MediaLinks TV, which as Forbes noted, is “a registered foreign agent and Washington D.C.-based outpost of the main Chinese Communist Party television news outlet” has been...