Hard numbers, past performance, and close observers of Newark politics don’t give Sheila Montague much chance of unseating the city’s popular mayor, Ras Baraka, in Tuesday’s election. Newark resident Dominick Tortorello, a more casual observer, didn’t even know she was running. “I’m really not big into politics,” said Tortorello, 42, a utility worker at Montclair State University who had just finished a volunteer shift at the Red Door soup kitchen and food pantry when Montague greeted him as he and a friend walked past her on Halsey Street. There are lot of people like Tortorello in Newark, wh…