Amy Chozick reports on the presidential race from Eugene, Ore.

The long Democratic presidential primary season is coming full circle.

The Obama campaign announced Saturday morning that it will hold a rally in Des Moines, Iowa, Tuesday.

It was in Iowa nearly five months ago that Barack Obama captured a come-from-behind first place victory in the caucus, dealing the first big blow to rival Hillary Clinton and convincing voters and Democratic superdelegates that he had the potential to win the nomination.

On Saturday, campaign spokesman Tommy Vietor sent out a release saying the candidate and his wife, Michelle, would hold an event in this “critical general election state that Democrats must win in November.”

The event comes the same day Oregon and Kentucky hold their primaries.

As Clinton campaigns rigorously through Kentucky, Obama is looking to pick up enough delegates in Oregon to give him the roughly 2,025 needed to officially secure the nomination. The Illinois senator currently has what appears to be an insurmountable lead in the all-important quest for delegates.