Washington (AFP) – US President Donald Trump has announced sweeping restrictions against Chinese-owned social media giants TikTok and WeChat, his latest explosive move aimed at countering China’s rising global power.Trump on Thursday signed executive orders giving Americans 45 days to stop doing business with the Chinese platforms, effectively setting a deadline for a potential pressured sale of viral video sensation TikTok to Microsoft.The president cited national security concerns for the moves, which also threw into doubt the American operations of WeChat’s parent firm, Tencent, an uber-pow…