Maryland Delegate Don Dwyer Jr. on Tuesday was charged with driving while under the influence of alcohol.

According to the Baltimore Sun, Dwyer, a vociferous opponent of gay rights, was pulled over on Route 100 traveling eastbound in Pasadena.

Dwyer, 55, failed a field sobriety test and told officers that he had had two beers earlier in the evening.

He was taken to a police station, where he refused to allow officers to administer a breath test for alcohol. A routine background check uncovered an expired registration.

Dwyer, a Republican from Pasadena, pleaded guilty earlier this year to operating a boat under the influence last year and is scheduled for sentencing on October 25. The boating accident left a 5-year-old girl with a fractured skull.

In an interview last year with the Capital Gazette, Dwyer said that his drinking increased for two reasons: his November 2011 separation from his wife of 31 years and he felt “betrayed” by colleagues who voted for a gay marriage bill.

The day before the vote, Dwyer told reporters that he had enough support to block the bill in the House. However, the measure narrowly cleared the chamber with the help of two Republicans, Wade Kach and Bob Costa.

Dwyer accused Kach and Costa, along with former Democratic Delegate Tiffany Alston, of selling him out.

“That betrayal really affected me,” he said. “I was physically ill. You pour your heart into an issue like that and it's devastating.”