Sen. Barbara Boxer, D-Calif., fumed at her Republican colleagues Thursday morning after they boycotted a hearing for Gina McCarthy, President Obama’s nominee to head the Environmental Protection Agency.

Boxer repeatedly scolded Republicans for their “fringe” behavior, warning them to “get out of the fringe lane.”

“It shows how obstructionist they are. It shows how their pledge to do better with women voters is false,” Boxer said, calling McCarthy “perhaps the most qualified nominee” to lead the EPA.

Boxer suggested that Democrats would explore the possibility of changing the rules of the committee so they could vote without Republicans.

“[W]e invite them back to do their job,” Boxer stated before adjourning the meeting. “Maybe some of them slept in this morning, maybe it was a little early for them to get up.”