A second poll out Wednesday shows President Obama opening a significant lead in Wisconsin, which had emerged as a critical battleground state, prompting both sides to divert money and resources to winning its 10 electoral votes. The latest poll, conducted by Marquette Law School in Milwaukee, shows Obama with a 14-point lead over Mitt Romney, well more than any other publicly released poll.
The ticket of Obama and Vice President Joe Biden leads Romney and Rep. Paul Ryan, R-Wis., 54 percent to 40 percent, the poll shows. Four percent of likely voters are undecided.
The newest poll is significantly different from the previous Marquette Law School poll, which showed Obama with a scant, 3-point advantage. It also differs from another new poll of likely Wisconsin voters released on Wednesday. That poll, conducted by Quinnipiac University for CBS News and The New York Times, showed Obama leading by a smaller, though still significant margin, 51 percent to 45 percent.
The new Marquette poll surveyed 601 likely voters, for a margin of error of plus or minus 4.1 percentage points. Thirty-four percent of likely voters identified as Democrats, up from the 28 percent who said they were Democrats in the previous Marquette poll. Twenty-six percent are Republicans, identical to the previous poll, and 38 percent are independents. The party-identification breakdown of the Marquette poll does not differ significantly from Wednesday's CBS News/New York Times/Quinnipiac poll.