At least not based on that quote.
President Obama endorsed "the need to seriously consider mobilizing a constitutional amendment process", whatever that means.
Exactly what it says. He thinks we should seriously consider mobilizing a process.
He did not endorse the Sanders proposal particularly, or any of the many other amendment versions that have been proposed.
How am I the first person in the thread to point this out? Do people just read the title? I'm doubting my own reading comprehension skills at this point since all the other people read it different.