evidence: WATCH: China trade deal ‘has nothing to do’ with call to investigate the Bidens, Trump says "I don’t think there’s anything improper about doing that," GOP Sen. Ron Johnson, chairman of the Homeland Security Committee, said of Trump’s call on China to investigate the business dealings of Hunter Biden, the son of leading Democratic presidential candidate Joe Biden. On Friday morning, Utah Sen. Mitt Romney dissented: "By all appearances, the President’s brazen and unprecedented appeal to China and to Ukraine to investigate Joe Biden is wrong and appalling." He added, in a tweet: "When the only American citizen President Trump singles out for China’s investigation is his political opponent in the midst of the Democratic nomination process, it strains credulity to suggest that it is anything other than politically motivated." Romney and Nebraska Sen. Ben Sasse appeared to be the only Republicans going public with concerns. Sasse said in a statement to the Omaha World-Herald: "Americans don’t look to Chinese commies for the truth. If the Biden kid broke laws by selling his name to Beijing, that’s a matter for American courts, not communist tyrants running torture camps."