See what these liberal college students do when Mike Pence begins speaking at their graduation

Dozens of Notre Dame graduates walked out of their commencement ceremony on Sunday in an apparent protest of the commencement speaker, Vice President Mike Pence.

Video shows that once a university administrator finished his introduction of Pence, students — many of whom were adorned in some form of rainbow colors, the universal symbol of support for LGBT people — began walking out of the area where graduates were seated.

Immediately, noise from the crowd increased and people could be heard cheering and "booing." It's not clear if the booing was directed at Pence or the students walking out.

Meanwhile, Pence began his speech unfazed by the student protesters.

"It's deeply humbling for me to participate in the 172nd commencement in Notre Dame's 175th year," Pence said as students filed out of the school's football stadium, where the commencement ceremony was held.

However, the walkout wasn't necessarily a surprise. A campus group, WeStandforND, vowed the walkout and protest days before Sunday's commencement. They said in a statement they planned to protest Pence mainly over his stances on same-sex marriage, immigration and his support of President Donald Trump — which the group alleged doesn't align with the Catholic faith.

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"The participation and degree-conferring of VP Pence stand as an endorsement of policies and actions which directly contradict Catholic social teachings and values and target vulnerable members of the University's community," Notre Dame student Xitlaly Estrada of WeStandforND said in a release.

It must be noted that Catholics believe God designed marriage as a covenant between one man and one woman.

Pence, who previously served as governor of Indiana before heading to the White House, blasted the progressive policies and ideas sweeping college campuses across the nation in his speech.

The vice president decried "safe zones" and "speech codes" as "destructive of learning and the pursuit of knowledge, and they are wholly outside the American tradition."

"As you, our youth, are the future, and universities the bellwether of thought and culture, I would submit that the increasing intolerance and suppression of the time-honored tradition of free expression on our campuses jeopardizes the liberties of every American," Pence said. "This should not and must not be met with silence."

During the commencement ceremony, the university also awarded Pence an honorary law degree.