technology develops here in berkeley, california, is lighting up delivery rooms in low-income countries where the electricity is spotty. and it s all powered by the sun. woodruff: and in the aftermath of last week s health care law arguments, jeffrey brown gets some perspective on a tug-of-war between the president and the supreme court. that s all ahead on tonight s newshour. major funding for the pbs newshour has been provided by: moving our economy for 160 years. bnsf, the engine that connects us. and by the alfred p. sloan foundation. supporting science, technology, and improved economic performance and financial literacy in the 21st century. and with the ongoing support of these institutions and foundations. and. this program was made possible by the corporation for public broadcasting. and by contributions to your pbs station from viewers like you. thank you. woodruff: the fall presidential field moved closer to firming up today in the wake of tuesday s repu