No, apparently “The interest on [US Government public] debt consumes 10% of the FY 2020 U.S. federal budget.” per “Interest on the National Debt and How It Affects You”, 21 Sept 2020, by TheBalance, a personal finance news site (https://www.thebalance.com/interest-on-the-national-debt-4119024). Actually the year-by-year amount ranges from 5.8% to 8.3% over 2008-2021. It helps that interest rates are really, really low right now.
What is your source for the claim that interest costs are 50% rather than 10% of the national budget?