Democratic candidates are ahead in the battleground states of Ohio, Virginia, FloridaÂ and Wisconsin, states that have been key Republican targets as they try to wrest majority Senate control.
At the same time, polls this week also show that Republicans still have the advantage in the House. House SpeakerÂ John A. BoehnerÂ (R-Ohio) was on the road this week, stumping for his majority in Florida, and Rep.Â Nancy PelosiÂ (D-San Francisco) returned to Washington with a full-throttled pitch in pursuit of the 25 seats needed to retake the chamber.
Most nonpartisan analysts now say that Senate control has become a more difficult climb for Republicans than at the start of the election cycle, while Democrats face a similarly tough mission in the House.
Overall favorable ratings have declined for Republicans, but the steady lead Democrats hold on the so-called generic ballot â€” the question of which party voters prefer to have in control of Congress â€” does not always translate into electoral turnout.
An analysis from the House Republican campaign committee suggests Democrats would need at least a double-digit advantage on the generic ballot to pick up the seats needed to shift the majority. The Democrats now have a 4 percentage point advantage, according toÂ a NBC News/Wall Street Journal poll.
Republicans started this election season favored to control both chambers, but their hopes in the Senate have slipped as presidential nomineeÂ Mitt RomneyÂ stumbled on the campaign trail and the quality of some Republican candidates has been outmatched by those on the Democratic side.
A new poll in the Missouri Senate race by the Democratic-leaning Public Policy put Democratic Sen.Â Claire McCaskillahead of Republican Rep.Â Todd Akin, 46% to 40%, with the libertarian candidate pulling a noticeable 9%.
In Massachusetts, where Democratic challengerÂ Elizabeth WarrenÂ is fighting to hold her narrow lead in the Senate race, former PresidentÂ Bill ClintonÂ made a fundraising appeal Wednesday, noting the personal appeal Republican Sen.Scott BrownÂ has among voters in the Democratic stronghold.
â€œNo matter your personal opinion of Scott Brown, that’s the political party that he wants to set the agenda in the United States Senate. It’s controlled by right-wing Republicans and tea partyÂ radicals,â€ Clinton wrote in the email appeal. â€œLet me reiterate: The balance of the United States Senate is at risk in 34 days — and Massachusetts will cast the deciding vote.â€