(REUTERS) – Thousands of people are expected to stream into an events center here on the banks of the Mississippi River on Tuesday to see Donald Trump. When they do, his presidential campaign will be waiting, looking to convert casual gawkers into hardcore supporters who will cast votes for the billionaire presidential candidate in the Iowa caucuses next year.

The Republican frontrunner’s surging campaign is largely viewed as powered by his personal celebrity and his persistent presence on television. But there’s another political upside to being one of the most famous men in America: You don’t have to go knocking door-to-door to find voters. They come to you.

When those voters enter the Grand River Center on Tuesday evening, they will immediately be diverted to tables where Trump’s staff will recruit them to be county precinct captains, organizers, and volunteers. It’s a huge competitive advantage in a presidential race where other Republican candidates at times struggle to attract crowds in the hundreds.

It’s another reason, beyond strong poll numbers, why Trump’s candidacy is being viewed with increasing seriousness both inside and outside Iowa, which holds one of the earliest nominating contests in 2016.

Read the rest of the story at Reuters.