OK you didn't like that painting (he was dead already fair enough) so here is one,
"Landsdowne" portrait by Gilbert Stuart, 1796.
He was still alive when it was painted and it hangs in the White House.

Name:  george-washington-gilbert-stuart.jpg
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What is wrong with it?
Hint,
The error I am trying to point out seems to happen in many of his portraits for some strange reason.