on ming up this morning "washington journal," climate policy reporter amanda riley talks about the supremeourt's decision to block the e.p.a.'s regulation on carbon emissions from power plants and a look at the u.s. and international esponse to the zika virus with exandra phelan and ben pershing discusses campaign 2016 and the role of super delegates in the presidential primary. host: good morning. it's saturday, february 13, 2016. with the south carolina primaries and nevada caucuses looming, the six remaining republican candidates are set to debate once again tonight in greenville, south carolina, for the ninth g.o.p. presidential debate of the cycle. on the democratic side, presidential candidates have now shared the debate stage half a dozen times, and with that many chances for the candidates to take questions, we're asking our viewers this morning if you believe there are any topics that have been missed or not explored enough. if you were moderating the next presidential primary debate, what would your questions be for any or all of the 2016 candidates? that'sur