The husband of the Democrat mayor of Northampton, Massachusetts, issued a groveling apology after screaming at a local man in a grocery store. 

Bill Scher, husband of mayor Gina-Louise Sciarra, apologized to his wife's constituents at a Northampton School Committee hearing on Thursday after his outburst sent shockwaves through the town. 

'I was the weak link in our local democracy,' said Scher, a left-wing political commentator and journalist, after being introduced by his wife to make the mea culpa. 

'What did I accomplish with this? I didn’t persuade anybody. I couldn’t hear well. I couldn’t listen. I couldn’t find common ground.' 

The apology to locals came after Scher was spotted exploding at school committee member Michael Stein, who has become an outspoken critic of Mayor Sciarra in the town. 

This has included Stein publishing columns in the Daily Hampshire Gazette criticizing Sciarra's handling of the school budget. 

Scher admitted that Stein's disapproval of his wife's time in office got under his skin, as he confronted Stein in a Stop & Shop on Wednesday.

The argument got so heated that a bystander had to intervene with a store employee, according to the Boston Globe. 

Bill Scher, husband of Democrat mayor of Northampton, Massachusetts Gina-Louise Sciarra, issued a groveling apology at a school board meeting (pictured) this week after admitting to screaming at a local man in a grocery store 

The argument reportedly saw Scher defend his wife, Mayor Gina-Louise Sciarra (right, seen with Massachusetts Governor Maura Healey) in an argument with a local critic over her handling of a school budget 

In his groveling apology to the school committee the day after his outburst, Scher said he sees his rant as a 'cautionary tale for others to avoid.' 

Scher works as a left-wing political commentator and is the politics editor of the Washington Monthly, and has also worked as a freelancer for Politico. 

He is reportedly known for his staunch support for his wife's political career, and has also authored the book 'Wait, Don’t Move To Canada: A Stay-and-Fight Strategy To Win Back America.' 

Scher said he approached Stein because he wanted to make him 'adopt a different tact in his public advocacy', but said his emotions got the best of him. 

'When he responded with points I didn’t agree with, I let my emotions get the better of me. I lost my temper, and I raised my voice,' he said. 

A 77-year-old woman who witnessed the argument told the Globe that she was in the Stop & Shop when she saw two men speaking, and one was 'shouting at the other.'