Ukraine's Tymoshenko - 'gas princess', prisoner, and next president?

Leader of opposition Batkivshchyna party and presidential candidate Yulia Tymoshenko attends an interview with Reuters in Kiev, Ukraine February 28, 2019. REUTERS/Gleb Garanich

KIEV (Reuters) - Yulia Tymoshenko has been Ukraine's prime minister twice, was the global face of a revolution, imprisoned by two different presidents, and the target of an operation to discredit her by President Donald Trump's former campaign manager.

Now the 58-year-old known for her fiery rhetoric and, once upon a time, for her peasant braid hairstyle, hopes to unseat her old rival Petro Poroshenko in a tightly fought presidential vote on March 31.