Polls show Democrats leading the race for Congress weeks before the midterms. Pollsters say response problems leave real uncertainty in those numbers.
Why it matters: Control of Congress for Trump's final two years is at stake. Democrats need three House seats and four Senate seats.
Where they split: The dispute is whether polls capture Republican voters accurately, or whether district lines and money will blunt a Democratic national lead.
Center coverage, 24 sources: The center sees Democrats clearly favored but warns that polling errors and turnout models leave the outcome uncertain.
Left coverage, 23 sources: The left sees a Republican Party scrambling to defend once-safe seats as Trump's unpopularity weighs on candidates.
Right coverage, 26 sources: The right sees talk of a blue wave as overstated, pointing to tight Senate polls, district lines and Republican cash.
What’s next: Republicans are moving resources into traditionally red districts and states to defend once-safe seats, CNN reported.
