From 1945 until 1981, every U. S. President decreased the % of national debt. From 1981 until 2009, every democratic president decreased the %, and every republican president increased it.
From 1945 until 2009 every U. S. President, except three, decreased our % of national debt. Those three, the only ‘conservative’ presidents since 1945, were Ronald Reagan, H. W. Bush, and G. W. Bush. They were the only presidents from 1945 until 2009 who did not reduce the % of national debt.