With less than a week to go before Wisconsin’s presidential primary, a new poll shows Republican Mitt Romney leading in the Badger State.

The Marquette Law School poll shows Romney winning Wisconsin with support from 39-percent of those responding, while former Senator Rick Santorum received about 31-percent. About 11-percent supported Republican Ron Paul, 5-percent backed Newt Gingrich, and 12-percent were undecided.

Poll director Charles Franklin says it’s a big shift from February when polling showed Santorum in the lead. While Santorum only lost support by a few points, Romney went from 18 to 39.

When it comes to which candidate stands the best chance against President Obama in November, Romney came out ahead. However, President Obama still won across the board with respondents, besting Romney 48 to 43-percent.

Franklin says the poll results reflect what’s been going on in the race nationally, with Romney showing strong support in the northern states and Santorum’s base stronger in the south.

The poll sampled 707 people by telephone March 22-25. It has a margin of error of plus or minus 3.8.

Wisconsin Voters head to the polls April 3rd.

AUDIO: Andrew Beckett reports (1:02)

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