In a generic ballot test, 52% of likely voters back the Democratic candidate for House of Representatives in their district while 42% back the Republican. Among all registered voters, Democrats hold a 12-point margin over the GOP, suggesting preferences have not shifted much since an August CNN Poll, which did not include an assessment of likely voters. The new poll marks the first time this election season CNN has looked at preferences among likely voters. Typically, likely voters in midterm elections are a bit more Republican-leaning than the broader pool of registered voters. In September of 2006, CNN polling also found Democrats with a 10-point lead over Republicans on the generic ballot.

Source: CNN September 13, 2018 16:07 UTC