Eddie Markey just dodged a bullet, which only goes to show that it is better to be lucky than good. If Shannon Liss- Riordan of Brookline is Markey’s only opponent in the 2020 Democrat primary for the U. S. Senate, then he has little to worry about. He will have even less concern if a second or third Democrat jumps into the primary race seeking to knock him off. That would only further split the Democrat vote and guarantee Markey the nomination. And while there may be a serious Republican out there willing to take the veteran Congressman on in...