President-elect Donald Trump is pushing back against any effort to undermine the US dollar.Andrew Harnik/Getty ImagesTrump on Saturday floated "100% tariffs" on the BRICS group of emerging markets.Trump is pushing back on efforts to dethrone the US dollar as the primary global reserve currency.Trump's remarks come as the BRIC nations seek to flex their economic strength on the global stage.President-elect Donald Trump on Saturday lashed out at the BRICS group of emerging market countries, threatening to impose 100% tariffs if they try to "move away" from the US dollar.BRICS comprises nine countries — Brazil, Russia, India, China, South Africa, Egypt, Ethiopia, Iran, and the United Arab Emirates — which are aiming to flex their economic power in a world where the US dollar continues to reign supreme as the leading global reserve currency.Amid Russia's push for BRIC nations to curb the international dominance of the US dollar, Trump took to his Truth Social platform to decry such a move."The idea that the BRICS Countries are trying to move away from the Dollar while we stand by and watch is OVER," he wrote.