Democrats and Republicans are going to the polls Tuesday in five northern states as the contest for delegates continues.

Front runners Donald Trump and Hillary Clinton are both poised to have a good night if polls are to be believed. According to an NBC/Wall Street Journal/Marist poll, Trump enjoys a 18-point lead in Pennsylvania with 45 percent of likely Republican voters saying they support him. Texas Sen. Ted Cruz has 27 percent support there and John Kasich has 4 percent.

That poll was taken prior to Cruz and Kasich’s announcement Sunday that they will join together in the primaries following Tuesday’s contests to try to keep Trump from getting a majority of the delegates needed to win the Republican nomination for president outright.

On the Democrat side, Clinton leads Sen. Bernie Sanders in the polls in all five states.

What’s at stake Tuesday?

For the Republicans

There are 172 Republican delegates up for grabs Tuesday.

>>What is a contested convention and will the Republicans have one?

For the Democrats

There are 384 Democratic delegates to be had Tuesday.

>>What is a superdelegate, and what do they do?

When will we know the results?

Polls in all five states close at 8 p.m. ET.

How many delegates are needed to win the nomination?

For Democrats, 2,383; for Republicans, 1,237.

Click here to see the latest delegate count.

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