Republican Rep. Mark Sanford, a Donald Trump supporter, is urging his party’s presidential nominee to release his income-tax returns. In a New York Times op-ed, Sanford, who says he does not like Trump’s “personal style” but is still backing him, blasts Trump’s “obstinacy” when it comes to his tax documents. “Not releasing his tax returns would hurt transparency in our democratic process, and particularly in how voters evaluate the men and women vying to be our leaders,” Sanford writes. “Whether he wins or loses, that is something our country cannot afford.” Trump has said he cannot release his returns because he is still under audit by the IRS. Sanford warned that the tradition of presidential nominees disclosing tax returns could be permanently “broken,” and said voters deserve transparency.