Obama did it. Note the graph. year after year Obama cut the debt. It increased bigly when Trump got in. The Dems are fiscal conservatives. Clinton set it up to make it go away.
Alternet did not create the graph. They posted it.
Obama didn't cut it, revenue increases cut the deficit as we recovered from the recession. That is not a criticism of Obama, just a fact. His two tax cuts increased the deficit somewhat but were probably needed as a stimulus. I don't think the $900 billion(?) stimulus bill accomplished much.