"With language like, 'I refuse to accept that alternative,' Obama has also placed pressure not just on Abbas and Netanyahu, but on himself," Miller said. "That's sometimes unwise."
By so strongly emphasizing his commitment and his stake in the process, Obama has put himself in the middle of the matter, Miller said.
"That's OK if Abbas and Netanyahu are prepared to get in there with him and make the right decisions," he said. "If not, he'll look naive and, worse, like he's failed."
Hours after Obama's appearance, the U.S. delegation walked out of a speech by Iranian President Mahmoud Ahmadinejad after he suggested that the U.S. government may have carried out the Sept. 11, 2001, attacks to ensure Israel's survival.