bush is the 1st president to receive 400k a year too, not surprising GDubb got a raise.
From Truman's second term Presidents have been given expenses allowances
of $50,000 a year, taxable from 1953, for which they do not have to
account. Since 1909 they have also received a traveling allowance,
currently $100,000, though most of their travel costs, like most of the
non-personal costs of the White House, are met from other budgets
Source