Of the 56 senators who have responded to the survey, eight said that mistakes have been made on their tax returns, and six said they have paid back taxes. Thirty senators said that no mistakes have been discovered on their returns and that they’ve never paid back taxes — at least to the best of their recollection…

Some Senate offices took issue with the line of questioning, saying it was either unfair or an invasion of privacy. Aides to one senator told Politico that they considered the survey “presumptuous and intrusive.” Some Senate press secretaries encouraged others not to respond to the survey.