The United States' mounting public debt poses the biggest macroeconomic threat to its long-term economic dominance, with record deficits, rising interest costs and political gridlock

The United States may continue to lead the global economy, but its growing debt burden has emerged as the biggest risk to its economic pillar.

The United States' mounting public debt poses the biggest macroeconomic threat to its long-term economic dominance, with record deficits, rising interest costs and political…