President Barack Obama is scheduled to be the commencement speaker at the University of Notre Dame's graduation next month.
Catholics around the country, however, are demanding the invitation be withdrawn.
The bishop of the Indiana diocese where Notre Dame is located has said he will not attend the ceremony.
Bishop John D'Arcy calls it a silent protest of President Obama's policies on life issues.
"I wish no disrespect to our president, I pray for him and wish him well, but a bishop must teach the Catholic faith in season and out of season, and he teaches not only by his words - but by his actions," he said in a statement. "My decision is not an attack on anyone, but is in defense of the truth about human life."
D'Arcy isn't the only Catholic leader protesting.
Archbishop John Nienstedt of the St. Paul-Minneapolis archdiocese sent a letter to Notre Dame's president saying Obama has "a deliberate disregard of the unborn."
Pro-life groups protested at the White House this week.
Randall Terry, founder of Operation Rescue, says the group has launched a campaign around the country to pressure Obama to cancel his speech.
"Notre Dame's invitation to him is treachery against the innocent babies who are even now dying under his rules, and it's treachery against the Catholic faith and the truth that human life must be protected," he charged.
The president of Notre Dame says the university has a tradition of inviting presidents to speak at commencement ceremonies, and that this should not be viewed as an endorsement of Obama's policies.