Final answer:
State primaries and caucuses are important processes in the US presidential election, allowing citizens to participate and select delegates. The statement that usually a winner is clear cannot be said of state primaries and caucuses.
Step-by-step explanation:
State primaries and caucuses are important processes in the United States presidential election. A primary is a state-level election where registered voters directly cast their ballots for their preferred candidate. On the other hand, a caucus is a meeting of party members where they discuss and vote for their preferred candidate. Both primaries and caucuses allow citizens to participate in the election process and select delegates who represent their choice at the party's state or national-level convention.
One statement that cannot be said of state primaries and caucuses is that usually a winner is clear. In some cases, primaries and caucuses may result in a clear winner, but there are instances where the race remains competitive, and a winner is not determined until later stages of the election.