Lawrence Journal-World: It’s a showdown over coal-burning power plants again. On Monday, as expected, Gov. Kathleen Sebelius vetoed legislation that would allow construction of the two 700-megawatt plants in southwest Kansas. She vetoed three similar bills last year. In her newest veto message Monday, Sebelius said of the legislation, “What was a bad idea last year, is an even worse idea today.” President Barack Obama is moving toward regulating carbon dioxide emissions, and Kansas doesn’t need …