What does the term "star-cross'd lovers" suggest?

It means that although they are in love, there are still some obstacles they face, for example, their parents do not allow them to see each other. 
Sorry if it doesn't make sense!

As the answer above said, even though they're in love it means that they have a few minor or major complications to have their relationship. like in Romeo and Juliet, he was seventeen she was thirteen, she was a rebound for Romeo. Plus, their families were feuding which makes them Star Cross'd Lovers.

Delegates: representatives who cast votes at a political party's national convention. binding: if a primary or caucus is “binding” that means the delegates won in that contest are legally bound to vote for a particular candidate at the parties national convention.a primary is a preliminary election used to determine a party's nominee for a specific office. the winner of the party's caucus, or primary, wins the party nomination for that state. then the delegates meet at their party's national party convention, which is a formal gathering of all party delegates from all states.