Gov. Andrew Cuomo sustained a lead over his Democratic primary opponent Cynthia Nixon by 31 percentage points, a Siena College poll released Monday found.

Cuomo leads Nixon among likely Democratic voters in the race, 60 percent to 29 percent as he seeks a third term.

The governor, first elected in 2011, also has a comfortable favorability rating among Democratic voters, 67 percent to 29 percent. Nixon’s favorability rating stands at 43 percent to 30 percent.

The result is in line with previous polls of registered Democratic voters.

Still, there are caveats that Nixon supporters have sought to point to in recent weeks as the race in voter surveys has remained virtually unchanged: It’s difficult to model a race like this one, given the primary falling on a Thursday, Sept. 13, after it was moved away from the final day of Rosh Hashanah.

At the same time, the Nixon campaign hopes to bring out new or energized Democratic voters dissatisfied with the current Democratic leadership in New York.

Nevertheless, the polling would suggest that’s a daunting task.

The Siena poll found Cuomo leading in in virtually all demographic categories against Nixon, an education advocate and actress, with large leads among moderate Democrats, suburbanites as well as black and Latino voters.

Nixon does maintain a lead over Cuomo when voters are asked about which candidate would be best to tackle certain issues, such as combating corruption and advancing progressive policies. But on education, a key issue for Nixon, Cuomo leads her among Democrats polled.

The starkest difference is with black Democrats, where Cuomo leads Nixon 75 percent to 19 percent. Among Latino voters, Cuomo leads Nixon 67 percent to 28 percent.

Cuomo’s running mate, Lt. Gov. Kathy Hochul, also faces a primary challenge from Brooklyn Councilman Jumaane Williams. Both candidates remain little known with voters and half of the voters are undecided. Hochul leads Williams 30 percent to 21 percent. Gubernatorial candidates run separately from candidates for lieutenant governor, with the winners running on a combined ticket in November.

Meanwhile, the race for the Democratic nomination for attorney general remains wide open.

New York City Public Advocate Letitia James drew an early lead, garnering 25 percent of the vote, with Rep. Sean Patrick Maloney receiving 16 percent, Zephyr Teachout at 13 percent and Leecia Eve earning 4 percent. A whopping 42 percent of Democrats remain undecided.

The poll of 630 likely Democratic voters was conducted from July 22 through July 26 and has a margin of error of 3.9 percentage points.