U.S. stock futures declined while the dollar strengthened amid renewed tariff threats from former President Donald Trump. The euro is approaching a two-year low as the dollar gains traction against other currencies, including the Canadian and Australian dollars. Reports indicate that Trump's tariff threats are exerting pressure on these currencies, leading to a notable shift in the foreign exchange market. Analysts suggest that the market's response reflects concerns over potential trade tensions, although stocks have shown resilience, posting gains despite the dollar's firming position.