Bernie Sanders has narrowed her lead, but Hillary Clinton still has a double-digit advantage among New York voters, says a Siena College poll of likely state presidential primary voters released Wednesday.

Down from a 21-point lead on March 7 among registered Democrats, Clinton’s lead in the latest survey is 52 percent to 42 percent. The March 7 poll had Clinton ahead of Sanders 55 percent to 34 percent.

On the Republican side, the poll shows Donald Trump maintaining a huge lead, garnering 50 percent compared with 27 percent for Ohio Gov. John Kasich and 17 percent for Texas Sen. Ted Cruz.

Sign up hereSign up for The 1600See alsoDelegate tracker

In March, Trump led among registered Republicans with 45 percent, followed by Kasich and Marco Rubio, each at 18 percent, and Cruz with 11 percent.

Among Democrats, Sanders ranks slightly more favorable at 75 percent to 20 percent than does Clinton at 73 percent to 25 percent.

Trump is rated slightly more favorable at 58 percent to 38 percent among Republicans, compared with 57 percent to 31 percent for Kasich.

advertisement | advertise on newsday

Steven Greenberg, Siena College pollster, said Sanders has extended his lead among state voters age 35 or younger by 17 points. Clinton remained most popular with voters 55 and older, leading by 22 points.

“The younger voters are feeling the ‘Bern’ but the question is will they come out and vote in large numbers, as older voters historically do?” Greenberg said.

Clinton also leads among black voters, 62 percent to 31 percent, and Latino voters, 54 percent to 42 percent.

With white voters, Clinton has a 49 percent to 46 percent lead, down from 52 percent to 35 percent last month. Among white women Clinton leads by 18 percentage points and among white men Sanders holds a 2 percentage point edge.

Trump appears an overwhelming winner in his home state, Greenberg said.

“The real question is will he get a majority of Republican votes or simply a very high plurality?” he said. “Currently, exactly half of likely Republican voters are with the Donald, while Kasich is in sole possession of second place.”

Trump leads among women by 19 points and among men with 27 points.

More than two-thirds of Democrats surveyed overwhelmingly think Clinton will be the next president, as do one-third of Republicans.

advertisement | advertise on newsday

Among Republican primary voters, 40 percent think Trump will win the election, while 33 percent think it will be Clinton.

The poll was conducted over six days, from last Wednesday to Monday, with telephone calls to 538 likely Democratic primary voters and 469 likely Republican primary voters.

Republicans and Democrats were independently weighted by age, region and gender to reflect known registration patterns and historic voter turnout.