PPP on the Brown-Warren Senate Race: A Polling Post-Mortem

Polls are back in the news, with the release of four public polls and an internal Gabriel Gomez campaign poll in the June 25 Massachusetts special Senate election to replace John Kerry. 3 of the 4 public polls show Ed Markey with a distinct but still surmountable lead, an average of 6 points; the fourth shows him up by 17 and looks like an outlier, adding 2.7 points by itself to Markey’s lead in the RCP average. The Gomez campaign’s internal poll shows Markey by 3; if you use the general rule of thumb that a campaign conducts multiple internal polls and will only release its most favorable internal, that’s consistent with this currently being a 5-7 point race. Which is not a bad place for a Republican to be in Massachusetts five weeks before the election – it gives Gomez a puncher’s chance in a special election – although you’d clearly still put better than 50/50 odds on Markey.

The closest public poll so far was put out by progressive Democratic pollsters PPP; its first poll of the race has Markey up by 4, 44-40. Let’s take a look at how PPP polled the last Senate race in Massachusetts, the 2012 race between Scott Brown and Elizabeth Warren, which Warren ultimately won 54-46. That race may be less predictive of this one than the 2010 special election between Brown and Martha Coakley (in which PPP was one of the more reliable pollsters), but it’s interesting as an exercise in examining how PPP samples the electorate.

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Seven Lessons From The Brown Bombshell

You can’t throw a rock in the blogosphere without hitting a postmortem on Scott Brown’s decisive defeat of Martha Coakley for the Massachusetts Senate seat formerly infested by Ted Kennedy and, before him, JFK himself. I may as well add my own. Here are seven lessons to be drawn:

1. Defeat Has Many Fathers: There’s an awful temptation to spin the vote for Brown as the result of this cause or that – Coakley was a terrible, gaffe-prone candidate, Brown was a good one, glamourous and hard-working, Democrats were caught napping, voters were upset about Obamacare, voters were spooked by the Underwear Bomber, the special election was strangely timed, the enthusiasm gap, the poor track record of female candidates in Massachusetts, etc. But the fact is, it had to be all of them.

Look: In the past three decades, Republicans have won zero Senate races in Massachusetts but have won the Governorship four times with three different candidates. Bill Weld got 50.19% of the vote when he was elected in 1990, Paul Cellucci 50.81% in 1998, and Mitt Romney 49.77% in 2002. (Weld got over 70% of the vote when he was re-elected in 1994). Brown beat Coakley 52-47, meaning that he had the best showing by a non-incumbent top-level statewide Republican in decades. For contrast, in 2006, Deval Patrick carried Massachusetts 56-35, a 21-point margin. In 2008, Barack Obama carried Massachusetts 62-36, a 26-point margin. In other words, the electorate swung 26 points from the 2006 Governor’s race and 31 points from the 2008 presidential race. To illustrate:

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