BOSTON (AP) — Ayanna Pressley is attempting one of toughest political feats in Massachusetts — persuading Democratic voters to reject a long-time incumbent during a primary.

Making the task more difficult is the fact that Pressley has acknowledged she'll likely vote much the same way as incumbent U.S. Rep. Michael Capuano.

The race has drawn comparisons to Alexandria Ocasio-Cortez's defeat of 10-term New York Rep. Joe Crowley in a June Democratic primary.

Pressley, who would become the first black woman elected to Congress from Massachusetts, counts Ocasio-Cortez a friend.

There are big differences between the two primaries.

The 44-year-old Pressley serves on the Boston City Council and is no political newcomer. And the 66-year-old Capuano, who is white, isn't taking Pressley's challenge lightly.

The primary is Sept. 4, the day after Labor Day.