Commerce Secretary Wilbur Ross testifies during the House Oversight Committee hearing on on March 14, 2019. (AP Photo/Jose Luis Magana) WASHINGTON (CN) — Following repeated refusals to hand over critical documents that could illuminate errors in the 2020 U.S. census, Commerce Secretary Wilbur Ross was subpoenaed Thursday by House lawmakers. “Your approach to Congress’ oversight responsibilities has been abominable,” Congresswoman Carolyn Maloney, a New York Democrat who chairs the House Oversight Committee, wrote in a Thursday letter to Ross. “You have repeatedly withheld documents that should have been produced as a matter of course to your Department’s oversight committee. You have withheld them not only from Congress, but from the independent Government Accountability Office and, according to Census Bureau officials, the federal Judiciary as well.”