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.

The poll of 500 Boston voters likely to participate in the Sept. 9 preliminary election showed a wide gulf between Wu and Kraft, who drew 30 percent support to her 60 percent.

In a race where affordability issues have taken center stage, voters put housing and the economy and jobs at the top of their priorities list.