The Fifth Congressional District, where seven Democratic and three Republican candidates are vying to succeed Edward J. Markey in Congress, sweeps from the shore of Revere Beach to the storied brick buildings of Harvard Yard to the tony suburban streets of Weston and beyond to Framingham and Holliston.
But the geographic diversity of the district has not brought diversity in the Democratic candidates’ positions on the big political issues of the day.
In a Democratic primary race in a heavily Democratic district, their differences in policy are often ones of nuance.
The three Republicans, by contrast, are often opposite images of the Democrats on major issues. The winners of the two party primaries Oct. 15 will face off in a Dec. 10 general election Full story for BostonGlobe.com subscribers.