They have a global reach meaning they need to set up offices and stores in other countries, and as long as the US economy and these companies do well then that will have a positive influence on other countries by creating jobs
Over 90,000 jobs in Scotland are inside American companies and many jobs in South Ayrshire such as at Trump Turnberry are dependent on US investment and businesses
Donald Trump stopped any aid being given to charities in other countries that supported women if they passed on any information about abortions, even in the case of rape
The way US leaders act can influence others around the world
Donald Trump has waged war on the media in the USA calling respected channels "Fake News" when they give him bad coverage and so now tries to control the media through social media
The UK Prime Minister Boris Jonson, who Trump as nicknamed British Trump, has started to ignore mainstream media and use just social media to try and control the coverage of him