Clinton and Bush may duke it out on Twitter, but Sanders is social media king

WIth a bigger - and vastly more engaged - Facebook fan base, the 73-year-old Vermont senator looks a lot like young Americans' candidate of choice

Hillary Clinton and Jeb Bush, or at least their campaign staff, spent Monday night posting altered versions of each other's campaign slogans and logos, in a check-out-how-tech-savvy-I-am fight that might as well have been hashtagged #DownWithTheKids.

But while they were exchanging Twitter jibes, Bernie Sanders was in Los Angeles giving a speech to more than 15,000 raucous supporters, safe in the knowledge that, in social media terms at least, he appears to have the upper hand.