President Obama will be visiting colleges next week, and urging Congress to stop interest rates on student loans from doubling on July 1. The data indexing company Splunk went public yesterday -- big data is becoming big business. In France, Nicolas Sarkozy and the other presidential election candidates have a new ratings agency to deal with, which rates their plans to fix youth unemployment. And listeners respond to a commentary we ran earlier this week by Tucker Carlson, who calls for the defunding of public radio.