US stock market futures dipped on Thursday as investors turned cautious ahead of key May inflation data and fresh tariff threats from President Trump. The Dow Jones fell nearly 300 points, while the S&P 500 and Nasdaq futures dropped 0.5%. Market worries deepened after Trump warned US trading partners of "take it or leave it" tariff deals, which may arrive in letters soon. Meanwhile, Treasury Secretary Scott Bessent hinted that the 90-day tariff pause could be extended. Investors are also eyeing the upcoming Federal Reserve meeting for hints on possible interest rate cuts in 2025.