Suffolk is a very bad pollster.
Based on?
They have a pretty sterling track record in MA. They were the first pollster to put Scott Brown ahead in 2010, and from what I can quickly check, have gotten every major race in the last decade within a point or two. They're also pretty outstanding in NH – one of few pollsters to put Sununu ahead in NH '16 and generally quite accurate beyond that.
This appears to be their first time polling ME. But I trust them above almost all else when it comes to polling New England.
