Last night was the Massachusetts Senatorial Debate. At least one Big Four affiliate in both native MA markets (Boston and Springfield) as well as neighbors Albany, NY and Providence, RI, aired it from 7-8 PM.
Boston:
WCVB ABC 5 pre-empted a local newscast and local program "Chronicle", although the latter also airs on 5.2 MeTV at 6:30, pre-empting The Flintstones.
Springfield:
WSHM CBS 3 pre-empted Inside Edition and Entertainment Tonight. IE does not re-air in this market, but ET re-airs at 10:35 PM on WGGB 40.2 FOX.
WGGB ABC 40 pre-empted two episodes of Family Feud. Two other episodes air at 4:00 and 4:30. (Side note: WGGB does not carry any of Feud's four weekend runs at all, similar to how WWLP is one of the only stations not to carry Wheel of Fortune's sole weekend run)
WGGB FOX 40.2 pre-empted two episodes of Modern Family.
All three stations are co-owned. All affected shows' Monday episodes have been bumped to Saturday morning at 4:00 and 4:30 AM on their respective stations in place of Paid Programming, though IE and ET's makegoods are listed as repeats of Friday's episodes. WWLP NBC 22 was the only one of Springfield's Big Four to not air the debate, sticking with Wheel and Jeopardy!
Albany, NY:
WTEN ABC 10 moved Wheel and Jeopardy! to WXXA FOX 23, pre-empting a local newscast and one episode of Judge Judy. Another episode airs at 6:00 PM, and two other episodes air on WTEN at 3:00 and 3:30.
Providence, RI:
WJAR NBC 10 pre-empted a local newscast and Extra. The latter does not re-air.