400,000 x 8 = 3.2 million There are some other perks which even with rounding would top out at 4 million. He will have book deals and of course speechifying as we know can be um very lucrative.
If you will notice Hillary's book sales have been pathetic and hopefully publishers will have learned their lesson. The speechifying is only lucrative if it is part of a scheme to sell political influence. I am thinking the income earning potential that anyone with a D behind their name has been greatly diminished. For the last eight years Obama’s lifestyle has been subsidized by almost unlimited funds and at some point in the not so distant future some adjustments will have to be made. If these adjustments are not made, it will indicate that Obama has been taking a massive amount of money under the table from various interests.
In six months Obama's legacy will basically have been wiped out. He has ruled largely by the pen with executive orders and through his regulatory agencies such as the EPA. This stuff can be wiped out with a stroke of the pain and a change of leadership in the agencies directed by the executive branch.