Updated 10/28/2013 at 9:58am
(CNN) - With just over a week to go until Election Day, Democrat Bill DeBlasio maintains his overwhelming lead in the race for New York City mayor.
According to a New York Times/Siena College Poll released Monday morning, 68% of likely voters say they're backing DeBlasio, the city's public advocate, with 23% supporting Republican candidate Joe Lhota, the former chairman of the city's transit authority and deputy mayor to then-GOP Mayor Rudy Giuliani.
DeBlasio's 45-point lead is down slightly from his 49-point lead in the previous New York Times/Siena College poll from early October, and similar to his 44-point leads in Quinnipiac University survey from last week and an NBC New York/Wall Street Journal/Marist survey from two weeks ago.
"Approaching the homestretch of the campaign to choose New York's first new mayor in 12 years, Bill de Blasio is poised to win a lopsided victory over Joe Lhota," Siena College pollster Steven Greenberg said. "Over the last few weeks, Lhota has picked up a few undecided voters, however, he has failed in cutting into the more than two-thirds of likely voters who continue to support de Blasio."
If DeBlasio's lead holds up, it would be the largest margin of victory by a non-incumbent in New York history. And a DeBlasio victory on November 5 would make him the first Democrat to win a mayoral election in nearly 25 years.
There's still a third and final debate left in the race, but the poll suggests the contest is over, with 87% of likely voters, including three-quarters of Lhota supporters, saying they think DeBlasio will win.
"De Blasio is supported by three-quarters of Manhattan and Bronx voters, and two-thirds of Brooklyn and Queens voters," Greenberg said. " He leads Lhota 55%-38% among white voters, and de Blasio is backed by 90% of black and 76% percent of Latino voters. While Lhota has the support of three-quarters of Republicans, de Blasio does even better among Democrats, and has a two-to-one lead among independents, in a city with six times as many Democrats as Republicans."
The final debate was rescheduled from Tuesday, October 29 to Wednesday, October 30 when the two candidates issued a rare joint statement asking that their last showdown not coincide with the one-year anniversary of Hurricane Sandy.
The winner of the election will succeed three-term Republican turned independent Mayor Michael Bloomberg.
The New York Times/Siena College Poll was conducted October 21-26, with 701 likely voters in New York City questioned by telephone. The survey's sampling error is plus or minus 3.7 percentage points.