Answer:
He was assassinated while campaigning to be the Democratic candidate for the presidential election in 1968.
Step-by-step explanation:
When Robert F. Kennedy was assassinated by Sirhan Sirhan in 1968, he was campaigning to be the Democratic candidate for the presidential election in 1968. There was a very good chance that he could have secured that nomination and faced the Republican candidate Richard Nixon in the Election of 1968.