With President Donald Trump tossing out some red-meat comments tonight about NFL players who protest the National Anthem – “get that son of a bitch off the field right now” – NBC sportscaster Bob Costas offered up a slightly more elegant solution. Costas, appearing tonight on HBO’s Real Time with Bill Maher, didn’t seem willing to go quite as far as Maher in blanket-defending Colin Kaepernick, who took a knee – and lost a career – to protest police shootings of black…