What happens during the 'winnowing process' of the nomination campaign?

During the winnowing process of the nomination campaign, candidates are eliminated from the race. This process occurs as the campaign unfolds, particularly during the primaries and caucuses, as candidates compete for support from party members and voters. As some candidates perform poorly in early contests, they often withdraw from the race due to lack of funding, dwindling support, or poor polling results. This elimination narrows the field and helps determine which candidates are viable contenders for the party's nomination, ultimately shaping the final candidates who will represent the party in the general election. The winnowing process is crucial as it not only focuses the attention on the leading candidates but also clarifies the party's direction as it moves toward the general election.