The first lady said her husband was mistaken for a waiter at a black-tie dinner.
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"For Jeb Bush to run in the primary will be very, very difficult," the senator said.
She spoke out at a New York City gala against inequality.
The president met with his national security team to discuss possible dangers.
Sixty-nine percent of voters favored Congress tackling legislation dealing with immigration.
The judge criticized the "arguably unequal and arbitrary" enforcement.
An Obama aide said the senator might not know much more about floor procedure than he does.
Sen. Joe Manchin (D-W.Va.) knocked Sen. Tom Coburn (R-Okla.) for objecting to legislation.
The Florida senator thinks Bush would be a "formidable candidate," his spokesman said.
For the first time since the financial crisis, more are hearing good news.