Hillary Clinton and Donald Trump hold tightening leads in the upcoming Maryland primary, according to a new Washington Post-University of Maryland survey.

Polls show Democratic front-runner Clinton holding a 55 percent to 40 percent over liberal-minded Vermont Sen. Bernie Sanders among likely voters for the April 26, showdown.

Clinton led Sanders by at least double that cushion in a poll taken by the Baltimore Sun just last month. Maryland is viewed as a stronghold for the former first lady because of its proximity to Washington and heavy African-American tinged electorate, a demographic that has heavily favored the former New York Senator throughout primary season.

Clinton Leads Among Black Voters and Women

Among black voters in Maryland, Clinton leads Sanders 63 percent to 33 percent and among women 60 percent to 35 percent.

On the Republican side, Trump leads Ohio Gov. John Kasich 41 percent to 31 percent, with Texas Sen. Ted Cruz bringing up the rear at 22 percent.

Kasich recently won his home state and is counting on a strong showing across a slew of Northeastern states bolster his status as a viable option. The Post poll shows him leading among college graduates with 43 percent, ahead of Trump's 28 percent and Cruz's 23 percent.

Meanwhile, Trump registers strong support from among Republicans without college degrees, leading with 51 percent among this group, compared with Kasich's 22 percent and Cruz's 21 percent.

In a general-election matchup, Clinton manhandles Trump, leading by some 35 points among all registered voters, a cushion that's even larger than President Obama's winning margins in the reliably blue state in both 2008 and 2012

"Trump, Clinton Still Leading in New York

As for the upcoming April 19, New York primary, polls show Trump sprinting out to more than half the vote and walloping Cruz by a 53 percent to 22 percent count. Kasich is an even more distant third at just 19 percent.

On the Democratic side, Clinton leads Sanders by an average of 11 points after once holding a lead as huge as 34.5 percentage points.