The Capitol Grinch was on full display today when a group of immigration activists, including several children, sang outside House Speaker John Boehner's congressional office in the Longworth House Office Building.

Singing to the melody of "We Wish You a Merry Christmas" the group altered the familiar refrain to "We pray for Speaker Boehner, we pray for Speaker Boehner, we pray for Speaker Boehner,…"

In an exchange captured on-camera and posted on YouTube, an officer with the U.S. Capitol Police, apparently not in the Christmas mood, expressed his annoyance at the frequent protests, leveling a direct warning to the demonstrators to stop singing.

"Not going to have it. Warning number one. That's all you get," the officer boomed. "This is getting old real fast. I'm not going to tolerate it. This is a place of business, and we do not sing in the hallways. ¿Comprende?"

The children looked frightened as one activist assured them they were safe.

"We got it, sir," the activist answered the officer in English. "We're going to pray quietly. We're not going to sing."

The officer then indicated he was going to stick around before reiterating his irritation:

"This is getting old real fast. Every day," the officer complains. "I'm done. I'm going to start making arrests."

The clip then cuts off, although Lt. Kimberly Schneider, a public information officer with the U.S. Capitol Police, told ABC News that no arrests were made Thursday at the Capitol related to demonstration activity.