Few could have predicted the rapid ascent of Rachel Maddow, a former Air America radio host, when she was gifted her own show by scrappy cable network MSNBC last fall. The channel quickly scored record ratings in Maddow’s 9 p.m. slot, doubling the audience figures of a year previous. It helped that we were in the midst of one of the most-watched elections in history, but the fact that the first openly gay host of a prime-time news show continues to best ratings for CNN veteran Larry King is a powerful reflection of shifting tides.