Nate Cohn writes at The New York Times:
On Sunday, the research firm YouGov, in partnership with The New York Times and CBS News, released the first wave of results from an online panel of more than 100,000 respondents nationwide, which asked them their preferences in coming elections. The results offer a trove of nonpartisan data and show a broad and competitive playing field heading into the final few months of the campaign.
The Republicans appear to hold a slight advantage in the fight for the Senate and remain in a dominant position in the House. They need to pick up six seats to gain Senate control, and they hold a clear advantage in races in three states: South Dakota, Montana and West Virginia. The data from YouGov, an opinion-research firm that enjoyed success in 2012, finds the G.O.P. with a nominal lead in five additional states.
The five states where the Republicans hold a slight lead in the YouGov panel include three Southern ones — Arkansas, Louisiana and North Carolina — where Democratic incumbents face tough re-election contests and where Mitt Romney won in 2012. Republicans also have a slight edge in Iowa and Michigan, two open seats in states that usually vote for Democrats in presidential elections.
The Republican advantage, however, is not especially significant in these states, suggesting that the campaign remains up for grabs. The results are broadly consistent with the Times’s forecasting model, which incorporates surveys, fund-raising data and other information, and currently gives the Republicans a 60 percent chance of winning the Senate.CNN reports:
The new CNN poll illustrates the turnout problem for the Democrats.
In the generic ballot question, the Democrats have a four percentage point 48%-44% edge over the Republicans among registered voters. The generic ballot asks respondents to choose between a Democrat or Republican in their congressional district without identifying the candidates.
But when looking only at those who say they voted in the 2010 midterms – when the GOP won back the House thanks to a historic 63-seat pick up and narrowed the Democrats' control of the Senate – Republicans hold a two-point 48%-46% margin.
The poll was conducted for CNN by ORC International from July 18-20, with 1,012 adult Americans questioned by telephone. The survey's overall sampling error is plus or minus three percentage points.