Nineteen of the 24 Democratic presidential candidates took the stage in Iowa on Sunday at the largest cattle-call event for the historically large field to date, but none of them managed to leverage it into a star turn. At a fundraiser for the Iowa Democratic Party at the DoubleTree convention center in downtown Cedar Rapids, candidate after candidate made their case in five-minute bursts, the first preview of what the first primary debate will look like later this month. Dennis McDermott, a Cedar Rapids resident with a short-list of three candidates, was asked if the rest of the field started to blur together. “Yes, it does,” she said.