President Obama visited the Islamic Society of Baltimore in Catonsville, Maryland, on Wednesday in his first trip to a mosque as president. He declared that attacks on Islam were an attack on all religions.

President Barack Obama: “If we’re serious about freedom of religion—and I’m speaking now to my fellow Christians who remain the majority in this country—we have to understand an attack on one faith is an attack on all our faiths.”

Republican presidential candidate Donald Trump—who has a record of suggesting President Obama might be secretly a Muslim born overseas—later discussed Obama’s visit to a mosque on Fox News.

Donald Trump: “I think that we can go to lots of places right now. I don’t know if he’s—maybe he feels comfortable there. We have a lot of problems in this country, Greta. There are a lot of places he can go, and he chose a mosque.”