S&P Global on Monday affirmed its "AA+" credit rating on the U.S., saying the revenue from President Donald Trump's tariffs will offset the fiscal hit from his massive tax-cut and spending bill.

S&P Global warned U.S. government debt credit ratings could "come under pressure" if political developments affect the independence of the Federal Reserve.

S&P Global Ratings affirmed the U.S.'s AA+ credit rating—one notch from the top of its investment-grade scale—saying it doesn't expect "persistent deterioration" in fiscal deficits. The ratings company thinks changes in U.