(CNN) - Mitt Romney's winning streak will continue Tuesday in Wisconsin if a new poll out of the Badger State proves correct.
The NBC/Marist Poll released Friday indicated Romney edged out his Republican opponents with 40% support from likely primary voters, followed by Rick Santorum's 33%, Ron Paul's 11% and Newt Gingrich's 8%.
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However, Santorum led among very conservative primary voters, strong supporters of the tea party movement and evangelical Christians.
Romney has captured states where evangelical voters constituted less than 50% of the electorate and failed to win in states where that number exceeded 50%. The key conservative voting bloc makes up 41% of the electorate in Wisconsin, according to the most recent survey.
If Romney captures the GOP nomination he will face an uphill battle against President Barack Obama in the state the former Illinois senator won in 2008 with 56.3% of the vote to then-Republican nominee Sen. John McCain's 42.4%.
Obama held a sizeable lead over his potential Republican rivals in hypothetical general election match-ups in the state, topping Romney 52% to 35% among registered voters, with 13% undecided. He also beat Santorum by 13 percentage points, 51% to 38%, with 11% undecided.
The president benefited from a gender gap that showed Obama beating Romney among women by 25 points and among men by 12 points. Obama's job approval rating in the state stood at 50%.
Voters head to the polls in Wisconsin, Maryland and the District of Columbia on Tuesday.
The poll surveyed 2,792 registered voters between March 26 and March 27 with a sampling error of plus or minus 1.9 percentage points and 740 likely Republican primary voters with a sampling error of plus or minus 3.6 percentage points.