Leading Republican presidential nominee Donald Trump appears to have just gone 'all-in'... *TRUMP SAYS HE'S SIGNED PLEDGE NOT TO RUN AS 3RD PARTY CANDIDATE And while he was at it, he took a jab at Hillary as "the worst secretary of state in the history of the world." Maybe The Economist is on to something. But of course, Trump did not stop there: *TRUMP SAYS IT'S `MORE APPROPRIATE' TO SPEAK ENGLISH IN CAMPAIGN And finally, this raised an eyebrow... pic.twitter.com/20IjGde6Gu — Max Roser (@MaxCRoser) https://twitter.com/MaxCRoser/status/639501129072680960!function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0],p=/^http:/.test(d.location)?'http':'https';if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src=p+"://platform.twitter.com/widgets.js";fjs.parentNode.insertBefore(js,fjs);}}(document,"script","twitter-wjs");