Sen. Michael Crapo (R-Idaho) is not expected to fight charges after he was arrested on suspicion of drunken driving, according to news reports.

Crapo, who was arrested last week after he ran a red light in northern Virginia, "does not plan to contest the charges," spokesman Lindsay Nothern told the Associated Press.

The news comes as a secondary blood alcohol test shows Crapo "registered a higher level about an hour after being arrested than when he was first tested by the police officer who stopped him," the AP reported. An initial report shows Crapo had a blood alcohol level of 0.11 percent after the officer pulled him over early Sunday morning.

Crapo's spokesman said he wasn't sure why the two reports produced different results.

In a statement, Crapo apologized for the incident, saying he was “deeply sorry for the actions that resulted in this circumstance.”

“I made a mistake for which I apologize to my family, my Idaho constituents and any others who have put their trust in me,” he said. “I accept total responsibility and will deal with whatever penalty comes my way in this matter.