Judge blocks US attempts to ban WeChat app   A petition has been raised by a judge to blocked US government attempt to ban the Chinese controversial messaging and payments app, WeChat app. US Magistrate Judge Laurel Beeler said the ban raised serious questions related to the constitution’s first amendment, guaranteeing free speech. The Department of Commerce had announced a bar on WeChat appearing in US app stores from Sunday, effectively shutting it down. The Trump administration has alleged it threatens national security. It says the app could pass user data to the Chinese government.   Is the US about…