Hong Kong, Aug. 15 -- Nearly ten months later that tycoon Jimmy Lai - a pro-democracy firebrand and persistent thorn in Beijing's side - remains behind bars, US President Donald Trump is intent on fulfilling his bold promise of freeing a pugnacious, self-made billionaire from a Hong Kong prison.

The 77-year-old media mogul has spent more than 1,600 days in a maximum-security prison, much of it in solitary confinement, staring down the possibility of spending the rest of his life there, reports CNN.

"One hundred percent I'll get him out. He'll be easy to get out," Trump declared in a podcast interview in October last, radiating his trademark confidence.

Lai, the outspoken founder of the now-shuttered Apple Daily - a fiercely pro-democrac...