Donald Trump grabbed the backing of 57 percent of people who said they strongly support a candidate. | AP Photo Poll: Trump, Clinton poised for victory in Pennsylvania

Donald Trump and Hillary Clinton command double-digit leads over their primary rivals in Pennsylvania, according to the results of a new NBC News/Wall Street Journal/Marist poll released Sunday.

Among Republicans likely to cast their ballots Tuesday, Trump has the support of 45 percent, an 18-point advantage over Texas Sen. Ted Cruz, who took 27 percent, and Ohio Gov. John Kasich at 24 percent. Seventy-one delegates are at stake in the state's primary, though just 17 are awarded statewide on a winner-take-all basis. The remaining 54 are unbound delegates.


Trump grabbed the backing of 57 percent of people who said they strongly support a candidate, leading among 52 percent of men and 52 percent of those who do not hold a college degree. Regionally, Trump performed best in the northeast region of the state, with 52 percent support. His lowest level of support—while still leading in that region—comes in the Philadelphia suburbs, where he holds a four-point advantage over Kasich, 38 percent to 34 percent.

Meanwhile, just 37 percent of college graduates said they supported him, along with 39 percent of women and 40 percent of white evangelicals, though he leads Cruz by four points among that group.

On the Democratic side, Clinton leads Sanders 55 percent to 40 percent, in line with a 16-point advantage over the last two weeks in the rolling Real Clear Politics polling average in the state, which awards its 189 pledged delegates on a proportional basis.

Clinton drew support from 67 percent of likely African-American voters, while just 29 percent said they would vote for the Vermont senator. The former secretary of state holds significant leads among voters older than 45 (66 percent to 28 percent), women (62 percent to 34 percent), those identifying as Democrats (60 percent to 36 percent) and those who are strongly behind a candidate (59 percent to 41 percent).

Sanders, however, led by wide margins among those 45 years old and younger (60 percent to 37 percent), those who identified as "very liberal" (58 percent to 41 percent) and self-described independents (55 percent to 39 percent). His advantage against Clinton among men is just outside the margin of error at 49 percent to 45 percent.

In hypothetical general-election matchups, Clinton leads both Trump (54 percent to 39 percent) and Cruz (52 percent to 41 percent), though Kasich holds a three-point edge over Clinton (48 percent to 45 percent).

Sanders leads all potential Republican challengers by wider margins, ahead of Trump by 20 points (57 percent to 37 percent), Cruz by 22 points (58 percent to 36 percent) and Kasich by six points (50 percent to 44 percent).

Marist College conducted the poll from April 18-20, surveying 2,606 registered voters in the state with an overall margin of error of plus or minus 1.9 percentage points. Among the 571 likely Republican voters surveyed, the margin of error is plus or minus 4.1 percentage points, and among the 734 likely Democratic voters surveyed, the margin of error is plus or minus 3.6 percentage points.