OMAHA, Neb. (AP) — Federal officials are saying little about how they chose a Nebraska startup to build an $11 million section of border wall in California, including whether they knew of the company's connections to a construction firm flagged in a government audit for "many potential fraud indicators."

The top Democrat on the House Committee on National Security is seeking answers from the Department of Homeland Security on what vetting was used last year to select SWF Contractors of Omaha for the job. The company, founded last year with only one employee, is an offshoot of Edgewood, New Yor...