Rep. Frank Wolf, R-Va. is calling on President Obama to speak up for Egypt's persecuted Christians.
Wolf says the president should forcefully denounce attacks on Coptic believers that took place at their main cathedral in Cairo last weekend.
An angry mob threw firebombs and rocks at Christians outside the cathedral Sunday, leaving two dead.
Wolf says attacks on Christians will continue unless Obama speaks out.
Meanwhile, Egypt's Coptic pope has accused his country's president of negligence.
Pope Tawadros II told an Egyptian broadcast network Tuesday that President Mohammad Morsi had vowed to protect the cathedral, but did nothing to stop the attack. He said the president acted with negligence.
"The church has been a national symbol for 2,000 years," Tawadros said. "It has not been subjected to anything like this even during the darkest ages ... There has been no positive and clear action from the state."
"But there is a God," he added. "The church does not ask for anyone's protection, only from God."