From the article....
"and a blood-red Edward Ruscha canvas featuring the words,
“I think maybe I’ll…,” fitting for a president known for lengthy
bouts of contemplation."
It is not a very good picture of the work, and I don't see anything
about replacing any presidential portraits. I rather doubt the curator
would allow that. As far as the residence goes, it has always been the
First Lady's prerogative to redecorate.