Answer:
For any political party, having their candidate become president is perhaps the most important goal.
Step-by-step explanation:
This is because a president gives a lot of power to the political party he belongs to, by appointing people from the party to assist him, and also, by setting the government policies of the country based on the political ideas of the party.
This is what would happen for the Democratic Party if Joe Biden becomes president, or for the Republican Party if Donald Trump is reelected. That is also why the members of each party campaign so intenseley for each candidate.