Michelle Wu called on her top challenger Josh Kraft to release his tax returns to reveal any financial interests or business “entanglements” he may have with the city that could impede his ability

Robert Kraft’s son, Josh Kraft, has left the Patriots franchise as he zeroes in on the Boston mayoral race, where early polling shows he’s trailing substantially to incumbent Michelle Wu. Josh, 58, is trailing Wu in the polls, 59-29 percent, ahead of this November’s election cycle. They are running as Democrats.

Mayor Wu has a 30-point lead over her main challenger Josh Kraft, according to the results of a poll commissioned by the Boston Globe and conducted by Suffolk University’s Political Research Center.