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 Davis RyanWhy the rush to condemn a carbon tax? House votes to go to conference on farm bill House backs resolution expressing support for ICE 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 KaineTimothy (Tim) Michael KaineDem infighting erupts over Supreme Court pick Election Countdown: Latest on the 2018 Senate money race | Red-state Dems feeling the heat over Kavanaugh | Dem doubts about Warren | Ocasio-Cortez to visit Capitol Hill | Why Puerto Ricans in Florida could swing Senate race Green Day's 'American Idiot' climbs UK charts ahead of Trump visit 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 Suzanne BaldwinElection Countdown: Senate, House Dems build cash advantage | 2020 Dems slam Trump over Putin presser | Trump has M in war chest | Republican blasts parents for donating to rival | Ocasio-Cortez, Sanders to campaign in Kansas Senate Dems build huge cash edge in battlegrounds Overnight Health Care: Over 7,000 fail to meet Medicaid work rules in Arkansas | Judge temporarily halts deportations of reunited families | GOP chair in talks over restarting ObamaCare payments 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.