WASHINGTON - Popular Chinese apps WeChat and TikTok will be prohibited from being downloaded from U.S. app stores as of the end of Sunday amid national security concerns, the Commerce Department said Friday, adding tension to the already intensifying U.S.-China rivalry.WeChat, a messaging and payments app, and TikTok, a short-form video sharing app, have both been facing the threat of a ban on transactions from the administration of U.S. President Donald Trump, which alleges the platforms capture vast swaths of data from U.S. citizens for transfer to the Chinese government.Under the measure…READ FULL ARTICLE