Schumer has called background checks the “sweet spot” of gun control legislation.

“It’s the fundamental building block of any serious gun violence prevention system,” said Josh Horwitz, executive director of the Coalition to Stop Gun Violence.

Horwitz said Coburn’s opposition to requiring records for private background checks calls into question whether the GOP lawmaker really supports expanded checks.

“It’s such a non-issue to me, the whole thing seems like a big stall tactic,” he said. “Saying there shouldn’t be a record, to me, is not negotiating in good faith.”