US 2016: Find Bernie and Clinton! On a candidate crawl in Iowa

Politics is personal in Iowa because the White House hopefuls have to get out to meet voters face to face, rather than rely on reaching them through television adverts.

And that means criss-crossing the Hawkeye state in the days before the 1 February caucuses - the first contest in the long nominating process - to shake as many hands and kiss as many babies as possible.

The BBC's Rajini Vaidyanathan hit the campaign trail in Iowa to see how many candidates she could see in a day.

Produced by the BBC's Franz Strasser and Sarah Holmes