Dan Mitchinson: US correspondent on Donald Trump celebrating his first 100 days in office - Heather du Plessis-Allan Drive

US President Donald Trump has celebrated the 100th day of his second term - and he spoke to party faithful at a gathering in Michigan.

He spoke of his achievements in the role, mocked his Democratic predecessor, Joe Biden, and dismissed polls that showed his popularity slipping.

US correspondent Dan Mitchinson says Trump's trying to reassure people as the mass dissatisfaction over his tariffs draws backlash - and impacts the stock market. 

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