Hunter Biden has defied a congressional subpoena to appear privately for a deposition before Republican investigators who have been digging into his business dealings. Biden insisted outside the U.S. Capitol on Wednesday that he will only testify in public. The Democratic president’s son slammed his subpoena for closed-door testimony. Rep. James Comer of Kentucky is the chairman of the House Oversight Committee and has said Republicans expect “full cooperation” with their original demand for a private deposition. Hunter Biden lives in California and says he's in Washington to testify at a public hearing. Biden asks what Republicans are afraid of.