That means absolutely nothing. Our national debt grew 9 trillion under O. All you're doing is shuffling chairs on the titanic. Its still gonna sink.
Look up the phrase correlation without causation. Just saying "Our national debt grew 9 trillion under O" without noting the context of the extra spending being necessary to keep us out of a depression is disingenuous.
The increase in deficit spending caused by unemployment insurance payments, food stamps, the stimulus package, and the related decrease in tax receipts due to depressed economic activity and stimulative tax cuts, were all due to economic conditions Obama inherited.
Add the fact that the recession was global in nature and you have a recipe for a prolonged period of high deficits. Something Obama kept deficit spending under control compared to Trump's profligate spending while the economy was growing at 2%+.