Romney's campaign has hoped to broaden the electoral map by winning Wisconsin, where polls have improved for the Republican since his selection of Rep. Paul RyanPaul RyanOvernight Finance: Dems introduce minimum wage bill | Sanders clashes with Trump budget chief | Border tax proposal at death's door Sasse: Mont. Republican doesn't understand First Amendment Pelosi: Gianforte is ‘a wannabe Trump’ MORE (R-Wis.) as his running mate. But the latest Quinnipiac poll shows an improvement for Obama. 

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Most recent Colorado polls have shown the two candidates neck and neck in the state. The last time Quinnipiac polled there, in early August, it found Romney holding a 5-point lead.

The polls also offer some good news for Senate Democrats. 

Former Virginia Gov. Tim KaineTim KaineSenators move to rein in Trump with new ISIS war bill Kaine: ‘Broken promises’ in Trump budget Overnight Tech: FCC won't fine Colbert over Trump joke | Trump budget slashes science funding | Net neutrality comment period opens MORE (D) has a 51-44 percent lead over former Sen. George Allen (R-Va.), the first time all year that Kaine has broken the 50 percent threshold. The results might be a bit inflated for Kaine, though — most other polls of the race show it to be tied.

Rep. Tammy BaldwinTammy BaldwinDem senator presses Trump for combat ship funding Congressional Democrats going the wrong way on carried interest tax Dems request insider trading investigation into top Trump adviser MORE (D-Wis.) and former Wisconsin Gov. Tommy Thompson (R) are tied in their Senate race, according to the poll. Thompson started off the general election with much higher name identification statewide and led in polling a month ago, but Baldwin and her allies have outspent him on the airwaves in recent weeks. This is the third poll in as many days to show her improving in the state, though the other two were Democratic polls.

The polls of more than 1,400 likely voters in each state were conducted from Sept. 11-17, and had margins of error of plus or minus 2.5 percent in Colorado and Wisconsin and 2.6 percent in Virginia.