In his latest trade-related tirade, President-elect Donald Trump has set his sights on a group of emerging-market countries collectively known as the “BRICS.”

MOSCOW (Reuters) -The Kremlin said on Monday that any U.S. attempt to compel countries to use the dollar would backfire after U.S. President-elect Donald Trump threatened to impose tariffs on BRICS countries if they created their own currency.

Monday’s gains marked the latest leg of a powerful rally for the US dollar, which was boosted by Trump’s win in last month’s presidential election. Investors have been betting that Trump’s tariff plans will be inflationary, hampering the Federal Reserve’s ability to reduce interest rates.