Don't forget the impact of inflation. In other words, up $3.8 T in today's dollars is less than half of $7.5 T in yesterday's dollars.
Below is a graph showing increase in debt by percentage per year.
As much as I fuss about Trump and Bush running up debt in their years, it's hard to blame the total debt on Republicans more than Dims.
Source: https://www.macrotrends.net/2496/national-debt-growth-by-year
The two green bars on the right are the % of debt increase that Trump 2.0 has added so far. The red circled represents the Trump 1.0 years, with the large spike in year 2020 for over-the-top china virus spending. The blue circles represent the Biden and Obama years. If you ignore the 2020 spike, it looks to me like Trump's other 3 years in his first term have average per year debt increase than Obama's terms. The same for Trump's debt increase in first year 2nd term being less than the avg for Biden per year.
Look at how lower 2025 is from the prior two years (2023 and 2024 being Biden's last two years). But Biden's 4 years were an increase from Trump's first 4 years (sans 2020 and covid spending). And don't get me started on Obama adding way more to the debt than even big spending Bush.