WASHINGTON (AP) - Republican presidential candidate Mitt Romney is expecting to do well in primaries today in Wisconsin, Maryland and the District of Columbia. He's been increasingly directing his criticisms at President Barack Obama. Obama, meanwhile, is expected to sharply criticize a budget plan passed by House Republicans when he speaks to newspaper executives.

     WASHINGTON (AP) - Concern is beginning to build about the size of student loan debt, which has surged above $1 trillion. That's more than credit card and auto-loan debt. With a still-wobbly jobs market, these loans are increasingly hard to pay off and that poses a potential threat to a still-fragile economic recovery.

     MORGANTOWN, W.Va. (AP) - Coal miners and their families might find it easier to obtain black lung benefits soon. One proposed new rule would make damage caused by black lung an automatic presumption for totally disabled miners with at least 15 years on the job. The other rule would automatically transfer benefits from a deceased recipient to eligible survivors.

     DELAND, Fla. (AP) - Officials say three of five injured people suffered severe burns when a small experimental sputtered and crashed into a supermarket at a Florida shopping center. The Volusia County Sheriff's Office said a pilot and a passenger from the plane were airlifted to Orlando Regional Medical Center.

     BEIJING (AP) - Users of two popular microblog services in China can once again make comments after a three-day ban that prompted an outcry online. Two service providers said the interruption was aimed at "cleaning up" illegal and harmful information left on some microblogs. China's government routinely censors online content.

DELAND, Fla. (AP) - Authorities say a small experimental plane sputtered and crashed in flames into a supermarket at a Florida shopping center Monday evening, injuring five people and sending frightened shoppers running from the complex. Callers to 911 said the plane showed signs of trouble moments before it hit the roof of the supermarket in the Northgate Shopping Center in DeLand.

     WASHINGTON (AP) - President Barack Obama's campaign is launching a new television ad defending the president's energy policies and seeking to tie Republican Mitt Romney to the oil industry. Obama's new ad is airing in Colorado, Florida, Iowa, Nevada, Ohio and Virginia.

     MIAMI (AP) - A former South Florida pill mill operator whose clinics illegally dispensed hundreds of thousands of doses of powerful pain killers has pleaded guilty and agreed to cooperate in ongoing investigations. Vincent Colangelo pleaded guilty Monday to drug, tax evasion and money-laundering charges in Miami federal court.

     MIAMI (AP) - A federal appeals court has refused to rehear a case involving sanctions against two Miami-based federal prosecutors in a witness-tampering investigation. The 11th U.S. Circuit Court of Appeals previously overturned the $600,000 awarded to the defendant. Monday's decision lets that stand.