In Iowa's caucus, no candidate is seen to have gained any traction on Tuesday. But in the early nighttime hours, the backroom caucus — which Democratic presidential contenders have called a nightcap — took place in the Palm Springs Marriott Hotel, where supporters waited in line to register and learn their candidate had won their precinct.

The party's contest was less visible than the caucuses at Iowa's Democratic community centers, college campuses and schools. Palm Springs' had a party in the ballroom with a microphone and two organizers as well as the slightly smaller caucus elsewhere in the hotel ballroom. A webinar, hosted by the Democratic Party of Riverside County, was available from 5 to 6 p.m.

The Palm Springs contest pitted former Rep. Beto O'Rourke, D-Texas, against Sen. Amy Klobuchar, D-Minn.

A caucus establishes an election night rule: Those who show up and vote after a certain hour are counted as winners of the night, party leaders said.

Some local leaders in the Democratic Party had said a knockout would be needed for voters who had waited hours to participate in the caucus. With her lead over O'Rourke, Klobuchar has about 50 delegates, while O'Rourke would likely have reached about a third that number and Sen. Bernie Sanders about 6 or 7 percent.

The Palm Springs winner, according to the DPP, is Amy Klobuchar, she said.

It looks like Klobuchar won the competitive area of Indian Wells — which stretches from Interstate 15 east to State Route 76 — by about 10 votes, she said.

"I'm energized," she said. "We're going to continue to do more of these events across the country. We're going to pick up momentum."

Watch Kirsten Fleming report from Palm Springs: