Abortion would immediately become illegal in at least 12 states if the Supreme Court were to overturn Roe v. Wade, and more would likely follow suit quickly.
Why it matters: The Mississippi case before the Supreme Court Wednesday could throw Roe's survival into question, or at least narrow its scope.
Massachusetts Gov. Charlie Baker (R), a moderate who typically ranks as one of the nation's most popular governors, and Lt. Gov. Karyn Polito (R) announced Wednesday that they will not seek third terms in 2022.
Why it matters: The decision leaves the gubernatorial race wide open and will likely affect multiple down-ballot races next year. Baker was expected to be the front-runner had he joined the race.