OAKLAND, Calif. (AP) -- It started peacefully enough: A midday rally at City Hall and a march. But as the day wore on, Oakland was hit by the most turbulent protests in weeks as Occupy demonstrators clashed repeatedly with police, leaving more than 400 people arrested.

JACKSONVILLE, Fla. (AP) -- Looking for a convincing win, a confident Mitt Romney said Monday the Florida primary is breaking his way and urged voters to send Newt Gingrich "to the moon." Gingrich claimed he's gaining ground and will stay in the race until summer.

SAN FRANCISCO (AP) -- California air regulators passed Friday sweeping auto emission standards that include a mandate to have 1.4 million electric and hybrid vehicles on state roads by 2025.

PUNTA GORDA, Fla. (AP) -- Rick Santorum is tired, almost broke - and going home. The former Pennsylvania senator is taking a pause from Florida campaigning just days before the Tuesday primary that even he expects to deal him a third consecutive loss.

ST. LOUIS (AP) -- Since the Iraq War ended there has been little fanfare for the veterans returning home. No ticker-tape parades. No massive, flag-waving public celebrations.

DORAL, Fla. (AP) -- Republican presidential candidate Newt Gingrich is calling for a measured approach to revising the nation's immigration laws, saying "too many enemies" stand in the way of sweeping change.

ALEXANDRIA, Va. (AP) -- The first major nutritional overhaul of school meals in more than 15 years means most offerings - including the always popular pizza - will come with less sodium, more whole grains and a wider selection of fruits and vegetables on the side.

WASHINGTON (AP) -- Secretary of State Hillary Rodham Clinton says she wants to step off the "high wire of American politics" after two decades and is again tamping down speculation that she might stay in government if President Barack Obama wins a second term.

ANN ARBOR, Mich. (AP) -- President Barack Obama called Friday for an overhaul of the higher education financial aid system, warning that colleges and universities that fail to control spiraling tuition costs could lose federal funds.

ATLANTA (AP) -- Imagine having the feeling that tiny bugs are crawling on your body, that you have oozing sores and mysterious fibers sprouting from your skin. Sound like a horror movie? Well, at one point several years ago, government doctors were getting up to 20 calls a day from people saying they had such symptoms.