Morning Joe regular Jon Meacham tends to be cast as the somewhat nerdy, pointy-headed professor, above the partisan fray. (Beats being described as the editor who flew Newsweek into the ground with Tina Brown.) Scarborough regularly teases him about the seven causes of the War of 1812, etc. In fact, under his scholarly guise, Meacham is just as much a Trump hater as the rest of them. On today's Morning Joe, Meacham literally described President Trump as dumber than a dog. He said: "He's failing to do what my Springer Spaniels know we should do, which is launch a Marshall...