Donald Trump needs another big night on Tuesday to stay on track to clinch the Republican nomination for president by the end of the primaries.

Five states vote. Trump can only afford to lose one.

There are a total of 172 delegates up for grabs. If Trump can win Pennsylvania, Maryland, Connecticut and Delaware, he can walk away with 92 delegates. Trump can pick up even more if things go just right in Pennsylvania’s quirky delegate primary.

Trump can afford to lose Rhode Island because the delegates are awarded proportionally. Even the losers can get delegates.

Trump’s path to the nomination is narrow, and by no means a sure thing. He heads into Tuesday’s contests with 845 delegates.

It takes 1,237 to win the Republican nomination.

(AP)