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Republican Gov. Scott Walker leads Democrat Tom Barrett 52% to 45% in a poll released Wednesday by Marquette Law School.

Walker’s lead is almost identical in the new poll to what it was in Marquette’s early May survey, when Walker led 50% to 44% among likely voters.

The survey of 600 likely voters was taken last Wednesday through Saturday, and has a margin of error of plus or minus four percentage points. Most of the poll was done before Friday’s debate.

The election is next Tuesday.

The same Marquette poll that showed GOP incumbent Walker leading in his recall fight also showed Democratic President Barack Obama leading in his re-election fight against Republican Mitt Romney, 51% to 43%.

The two were tied in Marquette’s early May poll.

In the race for governor, Walker’s lead is statistically within the margin of error, but Walker has enjoyed a small edge in most of the independent public polling this year.

In the new poll, 51% approved of Walker’s performance as governor, while 45% disapproved.

This is the sixth survey Marquette has taken since January 2012, and throughout those surveys Walker’s approval rating has shown little variation, reflecting how fixed attitudes about the governor have been after months of bitter political conflict in the state.

In those polls, the share of Wisconsin voters who approve of Walker’s performance has never dipped below 47% or climbed above 51%.

While there have been small fluctuations, Walker’s job approval in the new poll is almost identical to his job rating in the first 2012 poll Marquette did five months ago, when 51% approved and 46% disapproved.

In the new survey, 41% of voters viewed Barrett positively, while 46% viewed him negatively.

You can find the results here.