Pete d'Alessandro (D), a former campaign aide to Sen. Bernie Sanders Bernie SandersOutrage erupts over Breonna Taylor grand jury ruling Dimon: Wealth tax 'almost impossible to do' Grand jury charges no officers in Breonna Taylor death MORE (I-Vt.), on Tuesday was defeated in the Democratic Primary in Iowa's 3rd Congressional District.

D'Alessandro received roughly 15 percent of the vote and finished in third place.

Cindy Axne (D) won the primary with 58 percent of the vote and is set to face off against Rep. David Young David Edmund YoungEric Idle threatens to sue GOP committee over use of Monty Python song in ad Trump: DeJoy should be removed if it 'can be proven that he did something wrong' The Hill's 12:30 Report - Presented by Facebook - Trump's Labor Day news conference MORE (R-Iowa) in the race for the House seat in November.

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D'Alessandro served as Sanders's 2016 Iowa state director and received the senator's endorsement in January.

Sanders also helped raise money for d'Alessandro's campaign and headlined a rally for him in February.

D'Alessandro praised Sanders in a statement on Tuesday thanking the senator, saying his campaign would not have been possible without Sanders's 2016 "political revolution" where Sanders finished second to Hillary Clinton Hillary Diane Rodham ClintonDemocratic groups using Bloomberg money to launch M in Spanish language ads in Florida The Hill's Campaign Report: Presidential polls tighten weeks out from Election Day More than 50 Latino faith leaders endorse Biden MORE in the primaries for the Democratic nomination to run for president.

"Someone like me couldn't even be in the race," d'Alessandro said of Sanders paving the way for him. "The fact that so many people like me are in these races throughout this country is actually the story. We're gonna win some, we're gonna lose some, but the story isn't necessarily about the win-loss score."

The senator on Wednesday praised d'Alessandro in a statement saying "despite being heavily outspent," d'Alessandro "ran a great, grassroots campaign in Iowa. I am sorry he lost."

Young won the Iowa district by nearly 14 points in 2016. President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE defeated Clinton in the district by 3.5 percentage points.