Bill Clinton’s half-brother has been charged with drunken driving in California, police said Monday.

Roger Clinton, 59, was arrested after driving “erratically” in Redondo Beach at 7:20 pm Sunday, police said in a press release.

A worried driver called cops to complain that Clinton had been driving dangerously and followed him to give police “updates,” according to Redondo Beach police Lt. Joe Hoffman.

Clinton — who earned the nickname “Headache” by the Secret Service for bad behavior while his brother was president — was also arrested in 2001 on DUI charges, according to past reports.

Clinton “refused” to take a sobriety test at the police station, Hoffman added. His bail was set at $15,000.

Clinton’s sister-in-law, Hillary Clinton, will face off against Bernie Sanders in the California Democratic primary on Tuesday.

His lawyer, Walter Wiggins, said, “A mistake was made that was regretted.”

In 2001, Roger was pardoned by Bill for a 1985 cocaine-possession conviction.