Maryland voters had the opportunity to see this year’s Republican gubernatorial ticket pour buckets of ice water over their heads Friday afternoon. On Friday night, the Democrats followed suit.

Larry Hogan, the Republican nominee for governor, posted a video on Facebook showing him and his running mate, Boyd Rutherford, making good on the “ALS Ice Bucket Challenge,” a charitable act that’s gone viral as a fundraising and awareness effort to fight what is often referred to as Lou Gehrig’s disease.

In the video, Hogan and Rutherford dump buckets of cold water on their heads while standing in front of their campaign bus in Ocean City, where they are making appearances Friday and Saturday during the Maryland Association of Counties annual summer conference.

At the end of the Hogan video, Hogan challenges the Democratic ticket — Lt. Gov. Anthony G. Brown and Howard County Executive Ken Ulman — to participate within the next 24 hours.

It took less than that. On Friday night, Brown and Ulman dumped ice on their heads near the site of a crab feast that was part of the same conference. A few aides, family members and reporters were invited to witness the event as the sun set.