Front-runners Hillary Clinton and Donald Trump are expected to win big in Tuesday’s presidential primaries in five northeastern states, polls show.

Trump has double-digit leads in Pennsylvania, Connecticut, Delaware and Maryland over Republican rivals John Kasich and Ted Cruz.

And Democrat Clinton is also ahead of Bernie Sanders in the same four states.

The most recent surveys in Rhode Island were taken back in February, showing both Trump and Clinton in front.

Cruz and other anti-Trump forces are looking to the May 3 primary in Indiana — with 57 delegates at stake — as their best chance to block the real-estate magnate.

Sanders would also need to perform well in the Hoosier State.

But a new poll out Friday in the Indiana race shows a small lead for front-runners Trump and Clinton, though the race is tight on both sides of the aisle.

The WTHR/HPI Indiana poll had Trump with 37 percent, Cruz at 31 percent and Kasich trailing with 22 percent.

In the Democratic race, Clinton held a three-point lead over Sanders — 48-45 percent — which was within the margin of error, making the contest a virtual tie.