FiveThirtyEight

Welcome to Pollapalooza, our weekly polling roundup.

Poll(s) of the week

Fresh off a strong performance in Iowa, Sen. Bernie Sanders is ahead by 9 percentage points in our New Hampshire polling average and has a 74 percent chance of winning Tuesday’s primary, according to our forecast. That may sound like Sanders is an overwhelming favorite in the Granite State, but the race is still wide open. If the primary were held multiple times, Sanders would lose New Hampshire about 1 in 4 times, according to the forecast — about as likely as flipping a coin twice and getting heads both times.

Why is there so much uncertainty about the New Hampshire outcome, given Sanders’s lead in the polls? First of all, it’s a primary, and polling primaries is notoriously difficult: A larger share of voters in primaries are open to switching between candidates. And there will be several opportunities for New Hampshire voters to do between now and Tuesday. For one, the mess in Iowa is still sorting itself out. Former South Bend, Indiana, Mayor Pete Buttigieg, who our forecast thinks has a 20 percent chance of winning the state, could potentially benefit from the victory he claimed in Iowa. Friday’s Democratic debate could also sway voters, so we’re waiting for more polling.

Just how big is this group of people that could still change their mind? Polls have found that about two-fifths of likely Democratic primary voters in New Hampshire say they might change their mind before next Tuesday’s primary, though voters’ commitment varied by candidate.

Taken together, the polling suggests somewhere close to half of New Hampshire voters say they are capable of switching candidates. While a few polls show Sanders with the most loyal following, others have Biden ahead or close behind. The real question is, given the fluidity of the New Hampshire electorate, how many supporters could either pick up? Could voters shift to Buttigieg or Warren, or both, instead? Polling over the next few days will give us some clues, but don’t be surprised if there’s a lot of last-minute movement.

Oh! And there’s a three-hour debate tonight in Manchester, New Hampshire, hosted by ABC News, WMUR-TV and Apple News. This debate will be one of the candidates’ last chances to make their pitch to some of those persuadable New Hampshire voters.

Other polling bites

Trump approval

According to FiveThirtyEight’s presidential approval tracker, 43.9 percent of Americans approve of the job Trump is doing as president, while 51.8 percent disapprove (a net approval rating of -7.9 points). At this time last week, 42.9 percent approved and 52.7 percent disapproved (for a net approval rating of -9.8 points). One month ago, Trump had an approval rating of 42.0 percent and a disapproval rating of 53.3 percent, for a net approval rating of -11.3 points.

Generic ballot

In our average of polls of the generic congressional ballot, Democrats currently lead by 5.7 percentage points (47.2 percent to 41.5 percent). A week ago, Democrats led Republicans by 5.6 points (46.9 percent to 41.3 percent). At this time last month, voters preferred Democrats by 6.6 points (47.5 percent to 40.9 percent).


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