President Joe Biden's son Hunter Biden defied Republican investigators' subpoena for closed-door testimony, demanding to testify publicly Wednesday.In his first public statement since being criminally indicted twice, Hunter Biden, the president's son, said that he has "made mistakes" but slammed House Republicans for trying to "dehumanize me all to embarrass and damage my father.""For six years, I have been the target of the unrelenting Trump attack machine shouting 'Where's Hunter?' Well, here is my answer, I am here," Hunter Biden told reporters outside the Capitol.House Oversight Chairman James Comer and Judiciary Chairman Jim Jordan repeated their threat to hold Hunter Biden in contempt of Congress after he made his remarks.House Republicans had subpoenaed Hunter Biden to appear for closed-door deposition Wednesday morning to answer questions about his actions as part of the search for whether the president committed an impeachable offense in connection to his family’s foreign business dealings.Hunter Biden said he is willing to testify publicly as part of the GOP-led investigation into the president, but declined to say whether he would appear for a closed-door deposition with House Republicans.Comer reiterated that he still expects Hunter Biden to come for a closed-door deposition and then he can appear at an open public hearing."We expect to depose the president's son, and then we'll be more than happy to have a public hearing with him," Comer said, adding later, "I don't know anyone in more trouble than Hunter Biden, and he just got in more trouble today."Hunter Biden defended his father, saying, "Let me state as clearly as I can, my father was not financially involved in my business, not as a practicing lawyer, not as a board member of Burisma, not in my partnership with the Chinese private businessman, not in my investments home nor abroad, and certainly not as an artist."Video above: Hunter Biden's full remarks on Capitol HillHunter Biden's lawyers have told the House Republicans on the Oversight and Judiciary committees that he’s willing to testify by the Dec. 13 deadline – but only if he can do so publicly. House Republicans are insisting they want to talk to him behind closed doors first.CNN reported Tuesday that Hunter Biden was in Washington, DC, but it was unclear up until minutes before the scheduled deposition whether the president’s son would attend. The deposition deadline comes on the same day House Republicans are expected to vote on their resolution to formalize an impeachment inquiry into President Joe Biden.In his statement, Hunter said, "In the depths of my addiction, I was extremely irresponsible with my finances. But to suggest that is grounds for an impeachment inquiry is beyond the absurd. It’s shameless. There is no evidence to support the allegations that my father was financially involved in my business because it did not happen."CNN's Kristin Wilson, Haley Talbot, Shania Shelton and Evan Perez contributed to this report.