After Sens. Barack Obama and Hillary Clinton spoke back-to-back at the AIPAC meeting today, and the cablers took their speeches, it was time for Sen. John McCain to take the stage (in Baton Rouge). The big news was likely to be good news for the cablers — more political coverage. McCain urged Obama to agree to a series of 10 joint weekly town hall meetings, beginning next Thursday (in New York City) and continuing until the conventions: