Boris Nadezhdin says he will not rally his supporters to protest against his exclusion from next month’s presidential election — because, he says, he has learned from “Alexei Navalny’s mistakes.” “It would mean exposing my supporters to the police and Rosgvardia’s batons,” Nadezhdin told The Moscow Times, referring to the inevitable crackdown awaiting unauthorized protests in Russia. “That’s not right and doesn’t lead anywhere.” Nadezhdin, the only presidential hopeful to openly condemn the war in Ukraine, was barred from the ballot despite earning the endorsement of thousands of Russians, a d…