Hunter Biden listens as his lawyer Abbe Lowell speaks to the press outside a House Oversight Committee meeting on January 10, in Washington, DC. Kent Nishimura/Getty ImagesFor months, Hunter Biden said he would only testify before Congress if it was in public. But President Joe Biden’s son will now go behind closed doors Wednesday to face off with his Republican detractors on Capitol Hill for a deposition.The interview came together after months of public sniping, political stunts, the threat of criminal contempt and hardball negotiations that resulted in two key concessions from…