The American economy grew at a solid 2.3% annual rate the last three months of 2024, supported by a burst of year-end consumer spending, the government said, leaving unchanged its initial estimate of fourth-quarter growth. The outlook for 2025 is cloudier as President Donald Trump pursues trade wars, cutbacks in the federal workforce and mass deportations. The Commerce Department reported Thursday that growth in gross domestic product — the nation’s output of goods and services — decelerated from a 3.1% pace in July-September 2024. For all of last year, the economy grew 2.8%, compared to 2.9% in 2023.