While Fox News cleaned up at the RNC, MSNBC won big at the DNC. Check out the chart below which shows MSNBC’s growth since the democrats met four years ago — up +48% in primetime and total day viewership. MSNBC’s gain is CNN’s loss. The network is down -25% in primetime and -21% in total day vs. the 2008 DNC. FNC,  too is down -18% in primetime and down -13% in total day vs. DNC ’08. The younger viewer numbers are also up for MSNBC and down for both CNN and FNC.