(CNN) – A new poll of likely voters in Wisconsin shows President Barack Obama with an eight point lead over Republican nominee Mitt Romney in the state.
The Marquette University Law School poll indicates 51% of likely Wisconsin voters backing the president while 43% support Romney. Obama's lead falls outside the survey's sampling error of plus or minus 2.8 percentage points.
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Previous surveys of Wisconsin voters, however, show a much tighter race between the presidential hopefuls in the Badger State.
An NBC/Wall Street Journal/Marist poll released on October 18 showed Obama with 51% of support among likely voters and 45% of support for Romney. The six point margin falls within the survey's sampling error, meaning the two candidates are statistically tied in the state.
The last Marquette University poll released October 17 indicated Obama with 49% of support among likely voters in the state and Romney with 48%. Obama's one point edge also falls within the survey's sampling error.
Ten percent of likely voters in Wisconsin said they have voted early. Among early voters, 56% have supported the president and 36% backed Romney with 1% voting for third party candidates. The poll showed a similar trend in the U.S. Senate race. Democrat Rep. Tammy Baldwin received 52% support among early voters to Republican and former governor Tommy Thompson's 36% and 1% support for third party candidates.
Wisconsin, with its ten electoral votes, is a battleground state in the race for the White House and has been frequented by the campaigns and their surrogates as the days dwindle down to November 6.
Romney's running mate Rep. Paul Ryan is campaigning in Wisconsin, his home state, on Wednesday and will trick-or-treat with his children in his congressional district in Janesville for Halloween.
The Marquette poll also indicates a heated battle for the Senate. Baldwin has slight advantage over Thompson – 47% to Thompson's 43%. The Democratic candidate's edge falls within the poll's sampling error. Ten percent of likely voters were undecided or had no preference. In the previous Marquette poll, Thompson had 46% support and Baldwin had 45%.
The Marquette poll was conducted by telephone from October 25-28 among 1,243 likely voters in Wisconsin. The survey's sampling error is plus or minus 2.8 percentage points.
–CNN's Ashley Killough contributed to this report.