Ken Bone, the man who went viral after asking a question at a 2016 presidential debate, announced his support for Andrew Yang Andrew YangDoctor who allegedly assaulted Evelyn Yang arrested on federal charges The Hill's Campaign Report: Biden weighs in on police shootings | Who's moderating the debates | Trump trails in post-convention polls Buttigieg launches his own podcast 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.

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! pic.twitter.com/syoXxgua3J — Ken Bone (@kenbone18) February 2, 2020

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 Clinton Hillary Diane Rodham ClintonBarr criticizes DOJ in speech declaring all agency power 'is invested in the attorney general' Virginia Democrat blasts Trump's 'appalling' remark about COVID-19 deaths in 'blue states' The Hill's Campaign Report: Biden asks if public can trust vaccine from Trump ahead of Election Day | Oklahoma health officials raised red flags before Trump rally MORE (D) and now-President Trump Donald John TrumpBarr criticizes DOJ in speech declaring all agency power 'is invested in the attorney general' Military leaders asked about using heat ray on protesters outside White House: report Powell warns failure to reach COVID-19 deal could 'scar and damage' economy 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.