September 21, 2012, 5:00 PM GMT+0

Republican candidate Mitt Romney holds a six-point lead over Democratic incumbent President Barack Obama in Indiana, 50% Romney to 44% Obama, in a poll of 707 registered voters statewide, conducted by YouGov.

In Indiana:

Partisan loyalty is strong on both sides, as 91% of Democrats are sticking with Obama and 92% of Republicans are voting for Romney.

Independents favor Romney, with 53% Romney and 38% Obama.

Women split, Obama 48%- Romney 47%, while men favor Romney by 53%-40%.

Obama leads in Marion County (Indianapolis), 67%-31%, and in the Northwest 54%-40%.

Romney leads in the South, Central Indiana and Indianapolis suburbs, at 57%-37%, 53%-39% and 63%-33% respectively.

The oldest voters age 65+ favor Romney (65%-29%). The youngest under age 30 favor Obama (57%-36%).

Overall, Obama has lost favor among 10% of Indianans who voted for him in 2008.

Republican Richard Mourdock currently holds a narrow lead over Democrat Joe Donnelly, 41%-38%, in the race to succeed Sen. Richard Lugar, whom Mourdock upset in the Republican primary.

In the Governor’s race to succeed Republican Mitch Daniels, who is term-limited, Republican Mike Spence has a healthy lead, 48%-33%, over Democrat John Gregg.

Voters in Indiana are leaning decisively in favor of voting for Republican candidates for the U.S. House, with 45% intending to vote for the Republican candidate for the House in their district, and 35% for the Democrat. The poll was conducted online September 7-14, 2012.

Sampling method: Respondents were selected from YouGov’s panel using sample matching. A random sample (stratified by age, gender, race, education, and region) was selected from the 2005–2007 American Community Study. Voter registration, turnout, religion, news interest, minor party identification, and non-placement on an ideology scale, were imputed from the 2008 Current Population Survey Registration and Voting supplement and the Pew Religion in American Life Survey. Matching respondents were selected from the YouGov panel, an opt-in Internet panel.

Weighting: The sample was weighted using propensity scores based on age, gender, race, education, news interest, voter registration, and non-placement on an ideology scale.

Number of respondents: 707 registered voters statewide.

Margin of error + 4.9% (adjusted for weighting).

Click here for a complete report of results