I was being imprecise, it's not literally making up the entire deficit with new money, though the Federal Reserve's securities did increase by $200B over the past year, and M2 money supply increased by $1.2T. A lot of the deficit is inflationary in that it adds to the financial balance sheets of the private sector, even when financed by bonds sold to non-banks. It pushes up aggregate demand even when it doesn't increase the money supply. When aggregate supply can't keep up, you get inflation.