US President Donald Trump is expected to make an online appearance on Thursday at the World Economic Forum in Davos, Switzerland, where political and business leaders are discussing the possible effects of his administration's policies on the global economy.

Trump has already announced major shifts in policy from his predecessor Joe Biden.

Many leaders at the annual meeting have expressed concerns about the tariffs that the Trump administration is considering on imports from Mexico, Canada and China. They are also worried about the US withdrawal from the Paris Agreement -- the international framework to combat global warming.