"Who is that?" retired child psychologist Bernard Wiesemann of Des Moines said as the three-term Maryland congressman - and declared candidate for the 2020 presidential nomination - strode anonymously down the fair's busy Grand Concourse.
"It's John-somebody, right?" said Linda Gundlach, who sold Delaney a lemonade at the popular Steer 'N Stein watering hole near the grandstand. "I was wondering who he was."
Such is the burden of little-known Democrats who have begun making visits to early presidential nominating states. With more than a year and a half before Iowa holds the caucuses that signal the beginning of the presidential nomination process, the top Democratic stars and many other rising national figures are staying away for now, focusing instead on the upcoming midterm elections.
Delaney ambled through the crowd unnoticed on the fair's sun-splashed first weekend day. With his wife April and daughter Grace, he was recognized at the Iowa Democratic Party's booth in the teeming Varied Industries Building. But, despite a couple news reporters and cameras in tow, he blended into the crowd as he waded into the building's labyrinth of hot tubs, garden tractors and workout equipment.
And Delaney is better known than most: He's visited 14 times since last year and is currently airing his seventh television ad since February.
Undeterred, Delaney was on course to cross the finish line in visiting each of Iowa's 99 counties by Sunday, a metaphor for his campaign's theme that Democrats need to bridge not the liberal-moderate divide, but rural-urban.
"It's a really important thing to do. First of all, I think Democrat should campaign everywhere," Delaney said during a speech to about 50 listeners, as other fairgoers marched by.
Chris Taylor recognized him, but that's because the 47-year-old health care administrator, visiting from Washington, D.C., had worked with him on federal policy.
Farm couple Don and Connie Waller of nearby Van Meter stopped Delaney. "We've seen your ads," 75-year-old Don told Delaney.
Despite the nationalization of more recent presidential campaigns, Delaney, like others such as California Rep. Eric Swalwell, is taking a chapter from previous Iowa Cinderella stories. As a little-known Georgia governor, Jimmy Carter famously crisscrossed Iowa to emerge as a rising star in 1976.
More recently, then-Vermont Gov. Howard Dean toiled in Iowa with little notice throughout 2002, but gained traction there as a favorite for the 2004 caucuses before fading down the stretch.
Delaney and others, such as Montana Gov. Steve Bullock, are among a handful presidential C-listers in Iowa this month, for the fair and other political stops ahead of November's midterms. They were already being overshadowed by the appearance of Michael Avenatti, the lawyer suing President Donald Trump on behalf of an adult film actress. Avenatti was appearing, along with Delaney, at an Iowa Democratic Party fundraising in northern Iowa Friday evening.
As if on cue, Delaney was further upstaged Friday, when former House Speaker John Boehner, in Iowa visiting a former congressional colleague, happened upon the Maryland congressman's speech.
Reporters covering Delaney turned their attention to Boehner and began an impromptu press conference with the Ohio Republican, as Delaney continued in the background.
Finally, Delaney turned his attention to the distraction.
"Mr. Speaker, what a nice surprise. Speaker Boehner is in the House. You're looking good, Mr. Speaker," Delaney gushed.
As applause for Boehner died down, Delaney continued, "So, it's hard to top that."
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