The biggest race to watch in the Commonwealth is the unofficial race to become the next Senate President, according to WGBH State House reporter Mike Deehan. He says legislators Eileen Donoghue, Karen Spilka and Linda Dorcena Forry have all publicly announced they'll seek the office should it open up, following an investigation into sexual harassment allegations against Stan Rosenberg's husband, Bryon Hefner.

Two others races to keep an eye on are the re-election campaigns of two incumbents: Gov. Charlie Baker and State Auditor Suzanne Bump.

To listen to the interview with Mike Deehan and WGBH Morning Edition host Joe Mathieu, click on the audio player above.