Ken Bone endorses Andrew Yang for president: '#YangGang all the way!'

Ken Bone, the man who went viral after asking a question at a 2016 presidential debate, announced his support for Andrew YangAndrew YangThe Hill's Morning Report - Sanders steamrolls to South Carolina primary, Super Tuesday Yang calls on someone to 'pull an Andrew Yang' and bow out of 2020 race Yang criticizes caucus voting method, says they don't encourage high voter turnout MORE in the 2020 Democratic primary on Sunday.

In a video posted to Twitter the night before the Iowa caucuses, Bone implored the state's residents to support Yang, who he said would "put humanity first."

"You guys know I don't endorse candidates. Except for when I do. I'm fully on board, #YangGang all the way! Iowa, we need you. Tomorrow at 6:30 we can make this a caucus to remember!" Bone tweeted.

Bone wore his iconic red sweater in the endorsement video, the same sweater he famously wore during a 2016 presidential debate between former Secretary of State Hillary ClintonHillary Diane Rodham ClintonDemocratic insiders stay on the sidelines in 2020 race Hillicon Valley: Twitter falling short on pledge to verify primary candidates | Barr vows to make surveillance reforms after watchdog report | DHS cyber chief focused on 2020 The Hill's Campaign Report: High stakes at last Democratic debate before Super Tuesday MORE (D) and now-President TrumpDonald John TrumpWinners and losers from the South Carolina debate Five takeaways from the Democratic debate Democrats duke it out in most negative debate so far MORE.

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"The Iowa caucus is tomorrow. It's a critical step in what's already been a grueling election cycle. Show them what we got #YangGang," he added in a tweet sent earlier Sunday evening.