Sane people look at this chart and see that Obama reduced black unemployment 1 point per year for 7 years before Trump took office. It shows a downward trend that started during Obama and continued during Trump. Trump is taking credit for reducing black unemployment himself and that is something this chart shows did not happen.
That's exactly the OPPOSITE OF THE TRUTH. Obama did noting but sit by idly, while the economy and unemployment sprung back to normal on their own. Trump DOES get credit for rescuing us from Obama's lousy decline of GDP from 2.3 to 1.2 in 2016. And also in Obama's last year (2016) unemployment ROSE in 5 different months (March, April, June, August, and September)
2016 4.9 4.9 5.0 5.0 4.8 4.9 4.8 4.9 5.0 4.9 4.7 4.7
2017 4.7 4.7 4.4 4.4 4.4 4.3 4.3 4.4 4.2 4.1 4.2 4.1
2018 4.1 4.1 4.0 3.9 3.8 4.0 3.9 3.8 3.7 3.8 3.7 3.9
2019 4.0 3.8 3.8 3.6 3.6 3.7 3.7
Bureau of Labor Statistics Data