Morning Edition

Officials in San Gabriel Valley set up a quarantine zone after a lemon tree was found infected with citrus disease. That disease almost wiped out Florida's citrus crop a few years back.

Former Pennsylvania Senator Rick Santorum suspended his presidential campaign Tuesday. It had lasted longer than anyone expected, but Santorum was well behind front-runner Mitt Romney in the race for delegates.

A tax-the-rich proposal named after Warren Buffett has little chance of passing this year, but that hasn't stopped the debate over what impact it would have.

Some economists are skeptical that a 30 percent minimum tax on people with million-dollar incomes — known as the "Buffett rule" — would do much to reduce the deficit or boost the economy. But the Obama administration says the proposal is necessary to make the tax code more equitable.

The World Bank is expected to announce its new president in the next several days. For the past six decades, the bank has been led by an American. President Obama has already nominated Dartmouth College President Jim Yong Kim for the job. But for the first time in its more than 60-year history, there is serious international competition for the job.